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Students can Download Tamil Nadu 12th Computer Science Model Question Paper 1 English Medium Pdf, Tamil Nadu 12th Computer Science Model Question Papers helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

TN State Board 12th Computer Sceince Model Question Paper 1 English Medium

General Instructions:

1. The question paper comprises of four parts.
2. You are to attempt all the parts. An internal choice of questions is provided wherever applicable.
3. All questions of Part I, II, III and IV are to be attempted separately.
4. Question numbers 1 to 15 in Part I are Multiple Choice Questions of one mark each.
   These are to be answered by choosing the most suitable answer from the given four alternatives and writing the option code and the corresponding answer
5. Question numbers 16 to 24 in Part II are two-mark questions. These are to be answered in about one or two sentences.
6. Question numbers 25 to 33 in Part III are three-mark questions. These are to be answered in about three to five short sentences.
7. Question numbers 34 to 38 in Part IV are five-mark questions. These are to be answered in detail Draw diagrams wherever necessary.

Time: 3 Hours
Maximum Marks: 70

PART – 1

Choose the correct answer. Answer all the questions: [15 × 1 = 15]

Question 1.
The duration for which a variable is alive is ………………..
(a) Scale
(b) Life time
(c) Static
(d) Function
Answer:
(b) Life time

Question 2.
………………. describes the lower bound of an algorithm.
(a) Big Ω
(b) Big Θ
(c) Big O
(d) Big ⊗
Answer:
(a) Big Ω

Question 3.
How many types of operators are there?
(a) 2
(b) 3
(c) 4
(d) 5
Answer:
(d) 5

Question 4.
The keys in python, dictionary is specified by ……………..
(a) =
(b) ;
(c) +
(d) :
Answer:
(d) :

Question 5.
…………….. is used to access an element in a list.
(a) Element
(b) i
(c) Index
(d) Tuple
Answer:
(c) Index

Question 6.
The command to delete a table is ………………..
(a) Drop
(b) Delete
(c) Delete all
(d) Alter table
Answer:
(a) Drop

Question 7.
‘skipinitialspace’ is used for removing ……………….. after delimiter.
(a) White spaces
(b) Double quotes
(c) Comma
(d) Colon
Answer:
(a) White spaces

Question 8.
List literals are written using ………………
(a) [ ]
(b) ( )
(c) { }
(d) <>
Answer:
(a) [ ]

Question 9.
What does ……………… name ………………. contains?
(a) C++ file name
(b) Main ( ) name
(c) Python file name
(d) OS module name
Answer:
(c) Python file name

Question 10.
Which of the following clause avoid the duplicates?
(a) Distinct
(b) Remove
(c) Where
(d) Group by
Answer:
(a) Distinct

Question 11.
Which function returns the smallest value of the selected columns?
(a) Min ( )
(b) Minimum ( )
(c) Small ( )
(d) Least ( )
Answer:
(a) Min ( )

Question 12.
Which is a python package used for 2D graphics?
(a) Matplotlib.pyplot
(b) Matplotlib.pip
(c) Matplotlib.numpy
(d) Matplotlib.plt
Answer:
(a) Matplotlib.pyplot

Question 13.
Skipping of first row heading in CSV file is given by ………………
(a) Skip
(b) Next
(c) Forward
(d) More
Answer:
(b) Next

Question 14.
Which mode is used when dealing with non-text files like images or exe files?
(a) Text
(b) Word
(c) Binary
(d) Exe
Answer:
(c) Binary

Question 15.
In python _ del _ ( ) method is used as …………….
(a) Delete
(b) Drop
(c) Truncate
(d) Destructor
Answer:
(d) Destructor

PART – II

Answer any six questions. Question No. 21 is compulsory. [6 × 2 = 12]

Question 16.
Who is an Algorist?
Answer:

1. A person skilled in the design of algorithms are called as Algorist.
2. An algorithmic artist.

Question 17.
What is a repeating operator?
Answer:
The multiplication operator (*) is used to display a string in multiple number of times.

Question 18.
Write note on dictionary comprehensions?
Answer:
In Python, comprehension is another way of creating dictionary. The following is the syntax of creating such dictionary.
Syntax
Dict = { expression for variable in sequence [if condition] }

Question 19.
What is the output of the following snippet?
T=1
while T:
print(True)
break
(a) False
(b) True
(c) 0
(d) No output
Answer:
(d) No output

Question 20.
List the control structures in python?
Answer:
There are three important control structures

1. Sequential
2. Alternative or Branching
3. Iterative or Looping

Question 21.
Pick the correct one to execute the given statement successfully, if_: print(x, ” is a leap year”)
(a) x % 2 = 0
(b) x % 4 = = 0
(c) x/4 = 0
(d) x % 4 = 0
Answer:
(b) x % 4 = = 0

Question 22.
What are the 4 types of function arguments?
Answer:

1. Required arguments
2. Keyword arguments
3. Default arguments
4. Variable-length arguments

Question 23.
Find output:
C = 65
Print (chr (C))
Answer:
Output:
A

Question 24.
Give the positive and negative index for list [10, 23, 41]
Answer:
Positive: 0 1 2
Negative: -3 -2 -1

PART – III

Answer any six questions. Question No. 29 is compulsory. [6 × 3 = 18]

Question 25.
Write a python program to check smallest of 3 numbers?
Answer:
num1 = int (input(“Enter first number : “))
num2 = int (input(“Enter second number : “))
num3 = int (input(“Enter third number : “))
if (num1 < num2) and (num1 < num3):
smallest=num1
elif (num2 < num1) and (num2 < num3):
smallest=num2
else:
smallest=num3
print(” The smallest number is”, smallest)

Output:
Enter first number : 12
Enter second number : 7
Enter third number : 15
The smallest number is 7

Question 26.
Write a note on count ( ) function?
Answer:

Question 27.
What are the advantages of user – defined functions?
Answer:

1. Functions help us to divide a program into modules. This makes the code easier to manage.
2. It implements code reuse. Every time you need to execute a sequence of statements, all you need to do is to call the function.
3. Functions, allows us to change functionality easily, and different programmers can work on different functions.

Question 28.
Write note on min ( ), max ( ), sum ( ) functions?
Answer:

Question 29.
What is the use of append ( ) and extend ( ) functions in python?
Answer:
In Python, append() function is used to add a single element and extend() function is used to add more than one element to an existing list.

Syntax:
List.append (element to be added)
List.extend ([elements to be added])

Question 30.
Define Nested list, give example for it?
Answer:
In the below example, Mylist contains another list as an element. This type of list is known as “Nested List”.
Nested list is a list containing another list as an element.
Example: Mylist = [ “Welcome”, 3.14, 10, [2, 4, 6] ]

Question 31.
Define list. How will you represent rational numbers with list?
Answer:
List is constructed by placing expressions within square brackets separated by commas. Such an expression is called a list literal. List can store multiple values. Each value can be of any type and can even be another list. Example for List is [10, 20].

Representing Rational Numbers Using List:
You can now represent a rational number as a pair of two integers in pseudo code: a numerator and a denominator
rational(n, d):
return [n, d]
numer(x):
return x[0]
denom(x):
return x[l]

Question 32.
Define memoization?
Answer:
Memoization or memoisation is an optimization technique used primarily to speed up computer programs by storing the results of expensive function calls and returning the cached result when the same inputs occur again.

Question 33.
Mention any 6 keywords?
Answer:

1. False
2. None
3. True
4. And
5. As
6. Assert

PART – IV

Answer all the following questions. [5 × 5 = 25]

Question 34 (a).
Explain the pseudo code to do Binary search?
Answer:
(I) Start with the middle element:

• If the search element is equal to the middle element of the array i.e., the middle value = number of elements in array/2, then return the index of the middle element.
• If not, then compare the middle element with the search value.
• If the search element is greater than the number in the middle index, then select the elements to the right side of the middle index, and go to Step-1.
• If the search element is less than the number in the middle index, then select the elements to the left side of the middle index, and start with Step-1.

(II) When a match is found, display success message with the index of the element matched.

(III) If no match is found for all comparisons, then display unsuccessful message.

[OR]

(b) Give the pseudo code for insertion sort?
Answer:
Step 1 – If it is the first element, it is already sorted.
Step 2 – Pick next element.
Step 3 – Compare with all elements in the sorted sub-list.
Step 4 – Shift all the elements in the sorted sub-list that is greater than the value to be sorted
Step 5 – Insert the value
Step 6 – Repeat until list is sorted

Question 35 (a).
Explain input function with example?
input( ) function:
Answer:
In Python, input( ) function is used to accept data as input at run time. The syntax for input( ) function is,
Variable = input (“prompt string ’’)

Where, prompt string in the syntax is a statement or message to the user, to know what input can be given. If a prompt string is used, it is displayed on the monitor; the user can provide expected data from the input device. The input( ) takes whatever is typed from the keyboard and stores the entered data in the given variable. If prompt string is not given in input( ) no message is displayed on the screen, thus, the user will not know what is to be typed as input.

Example: input( ) with prompt string
>>> city=input (“Enter Your City: ”)
Enter Your City: Madurai
>>> print (“I am from”, city)
I am from Madurai

Example: input( ) without prompt string
>>> city=input( )
Rajarajan
>>> print (“I am from”, city)
I am from Rajarajan

Note that in example-2, the input( ) is not having any prompt string, thus the user will not know what is to be typed as input. If the user inputs irrelevant data as given in the above example, then the output will be unexpected. So, to make your program more interactive, provide prompt string with input( ).

The input ( ) accepts all data as string or characters but not as numbers. If a numerical value is entered, the input values should be explicitly converted into numeric data type.

The int ( ) function is used to convert string data as integer data explicitly. We will learn about more such functions in later chapters.

Example:
x = int (input(“Enter Number 1: ”))
y = int (input(“Enter Number 2: ”))
print (“The sum = ”, x+y)
Output:
Enter Number 1 : 34
Enter Number 2 : 56
The sum = 90

Example: Alternate method for the above program
x,y=int (input(“Enter Number 1 :”)),int(input(“Enter Number 2:”))
print (“X = “,x,” Y = “,y)
Output:
Enter Number 1:30
Enter Number 2:50
X = 30 Y = 50

[OR]

(b) Explain various types of Relationships in dBMS?
Answer:
Following are the types of relationships used in a database.

1. One-to-One Relationship
2. One-to-Many Relationship
3. Many-to-One Relationship
4. Many-to-Many Relationship

1. One-to-One Relationship
In One-to-One Relationship, one entity is related with only one other entity. One row in a table is linked with only one row in another table and vice versa.
For example: A student can have only one exam number

2. One-to-Many Relationship
In One-to-Many relationship, one entity is related to many other entities.
One row in a table A is linked to many rows in a table B, but one row in a table B is linked to only one row in table A.
For example: One Department has many staff members.

3. Many-to-One Relationship
In Many-to-One Relationship, many entities can be related with only one in the other entity. For example: A number of staff members working in one Department.
Multiple rows in staff members table is related with only one row in Department table.

4. Many-to-Many Relationship
A many-to-many relationship occurs when multiple records in a table are associated with multiple records in another table.

Example 1: Customers and Product
Customers can purchase various products and Products can be purchased by many customers.

Example 2: Students and Courses A student can register for many Courses and a Course may include many students.

Example 3: Books and Student.
Many Books in a Library are issued to many students.

Question 36 (a).
Write a menu driven program that keeps record of books available in school library?
Answer:
class Library:
def init (self):
self.bookname=” ”
self.author=””

def getdata(self):
self.bookname = input(“Enter Name of the Book: “)
self.author = input(“Enter Author of the Book: “)

def display(self):
print(“Name of the Book: “,self.bookname)
print(“Author of the Book: “,self.author)
print(“\n”)

book=[ ] #empty list
ch = ‘y’

while(ch==’y’):
print(” 1. Add New Book \n 2.Display Books”)
resp = int(input(“Enter your choice : “))

if(resp==1):
L=Library( )
L.getdata( )
book.append(L)

elif(resp=2):
for x in book:
x.display( )

else:
print(“Invalid input….”)
ch = input(“Do you want continue….”)

Output:

1. Add New Book
2. Display Books Enter your choice : 1

Enter Name of the Book: Programming in C++
Enter Author of the Book: K. Kannan
Do you want continue….y

1. Add New Book
2. Display Books Enter your choice : 1

Enter Name of the Book: Learn Python
Enter Author of the Book: V.G.Ramakrishnan
Do you want continue….y

1. Add New Book
2. Display Books

Enter your choice : 1
Enter Name of the Book: Advanced Python
Enter Author of the Book: Dr. Vidhya
Do you want continue….y

1. Add New Book
2. Display Books

Enter your choice : 1
Enter Name of the Book: Working with OpenOffice
Enter Author of the Book: N.V.Gowrisankar
Do you want continue….y

1. Add New Book
2. Display Books

Enter your choice : 1
Enter Name of the Book: Data Structure
Enter Author of the Book: K.Lenin
Do you want continue….y

1. Add New Book
2. Display Books

Enter your choice : 1
Enter Name of the Book: An Introduction to Database System
Enter Author of the Book: R.Sreenivasan
Do you want continue….y

1. Add New Book
2. Display Books

Enter your choice : 2
Name of the Book: Programming in C++
Author of the Book: K. Kannan
Name of the Book: Learn Python
Author of the Book: V.G.Ramakrishnan
Name of the Book: Advanced Python
Author of the Book: Dr. Vidhya
Name of the Book: Working with OpenOffice
Author of the Book: N.V.Gowrisankar
Name of the Book: Data Structure
Author of the Book: K.Lenin
Name of the Book: An Introduction to Database System
Author of the Book: R.Sreenivasan
Do you want continue….n

[OR]

(b) Write a program to accept a string and print the number of upper case, vowels, consonants and spaces in the giving string?
Answer:
class String:
def _init_(self):
self.uppercase=0
self.lowercase=0
self.vowels=0
self.consonants=0
self.spaces=0
self.string=””

def getstr(self):
self.string=str(input(“Enter a String: “))

def countupper(self):
for ch in self.string:
if (ch.isupper()):
self.uppercase+=1

def count_lower(self):
for ch in self.string:
if (ch.islower()):
self.lowercase+= 1

def count_vowels(self):
for ch in self.string:
if (ch in (‘A’, ‘a’, ‘e’, ‘E’, ‘i’, T, ’o’, ‘O’, T, ‘L’)):
self.vowels+=1

def countconsonants(self):
for ch in self.string:
if (ch not in (‘A’, ’a’, ‘e’, ‘E’, ‘i’, T, ‘o’, ‘O’, T, ’L’)):
self.consonants+= 1

def countspace(self):
for ch in self.string:
if (ch=””):
self.spaces+=1

def execute(self):
self.count_upper( )
self.count_lower( )
self. count_vowels( )
self.count_consonants( )
self.count_space( )

def display(self):
print(“The given string contains…”)
print(“%d Uppercase letters”%self.uppercase)
print(“%d Lowercase letters”%self.lowercase)
print(“%d Vowels”%self. vowels)
print(“%d Consonants”%self.consonants)
print(“%d Spaces”%self.spaces)
S = String( )
S.getstr( )
S.execute( )
S.display( )

Output:
Enter a String: Welcome To Learn Computer Science
The given string contains…
5 Uppercase letters
24 Lowercase letters
13 Vowels
20 Consonants
4 Spaces

Question 37(a).
Explain python getopt module?
Answer:
The getopt module of Python helps you to parse (split) command-line options and arguments. This module provides two functions to enable command-line argument parsing.
getopt.getopt method
This method parses command-line options and parameter list. Following is the syntax for this method –
<opts> ,<args>=getopt.getopt (argv, options, [long options])
Here is the detail of the parameters –

argv – This is the argument list of values to be parsed (splited). In our program the complete command will be passed as a list.
options – This is string of option letters that the Python program recognize as, for input or for output, with options (like ‘i’ or ‘o’) that followed by a colon (:). Here colon is used to denote the mode.

longoptions – This parameter is passed with a list of strings. Argument of Long options should be followed by an equal sign (‘=’). In our program the C++ file name will be passed as string and ‘i’ also will be passed along with to indicate it as the input file.

getopt( ) method returns value consisting of two elements. Each of these values are stored separately in two different list (arrays) opts and args. Opts contains list of splitted strings like mode, path and args contains any string if at all not splitted because of wrong path or mode. args will be an empty array if there is no error in splitting strings by getopt( ).

For example The Python code which is going to execute the C++ file p4 in command line will have the getopt() method like the following one.
opts, args = getopt.getopt (argv, “i:”,[‘ifile=’])

In our examples since the entire command line commands are parsed and no leftover argument, the second argument args will be empty [ ]. If args is displayed using print( ) command it displays the output as [ ].
>>>print(args)
[ ]

[OR]

(b) Write a sql code using where clause to display the different grades scored by male students from student table?
Answer:
The WHERE clause is used to extract only those records that fulfill a specified condition. In this example we are going to display the different grades scored by male students from “student table” import sqlite3
connection = sqlite3.connect(“Academy.db”)
cursor = connection.cursor( )
cursor.execute(” SELECT DISTINCT (Grade) FROM student where gender=’M”‘)
result = cursor.fetchall( )
print(*result,sep=”\n”)
OUTPUT
(‘B’,)
(‘A’,)
(C’,)
(D’,)

Question 38 (a).
Write a program that accept data using python input ( ) command and write it in the Table called person?
Answer:
In this example we are going to accept data using Python input() command during runtime and then going to write in the Table called “Person”

Example:
# code for executing query using input data import sqlite3
# creates a database in RAM
con =sqlite3.connect(” Academy, db”)
cur =con.cursor( )
cur.execute(“DROP Table person”)
cur.execute(“create table person (name, age, id)”)
print(“Enter 5 students names:”)
who =[input( ) for i in range(5)]
print(“Enter their ages respectively:”)
age =[int(input()) for i in range(5)]
print(“Enter their ids respectively:”)
p_id =[int(input())for i in range(5)]
n =len(who)
for i in range(n):
# This is the q-mark style:
cur.execute(“insert into person values (?, ?, ?)”, (who[i], age[i], p_id[i]))
# And this is the named style: cur.execute(“select * from person”)
# Fetches all entries from table
print(“Displaying All the Records From Person Table”)
print (*cur.fetchall( ), sep-\n’)

Output:
Enter 5 students names:
RAM
KEERTHANA
KRISHNA
HARISH
GIRISH

Enter their ages respectively:
28
12
21

Enter their ids respectively:
1
2
3
4
5

Displaying All the Records From Person Table
(‘RAM’, 28, 1)
(’KEERTHANA’, 12, 2)
(’KRISHNA1, 21,3)
(‘HARISH’, 18,4)
(‘GIRISH’, 16, 5)

You can even add records to the already existing table like “Student” Using the above coding with appropriate modification in the Field Name. To do so you should comment the create table statement

[OR]

(b) Write a CSV file with a line terminator?
Answer:
A Line Terminator is a string used to terminate lines produced by writer. The default value is \r or \n. We can write csv file with a line terminator in Python by registering new dialects using csv.register_dialect( ) class of csv module.
For Example
import csv
Data = [[‘Fruit’, ‘Quantity’], [‘Apple’, ‘5’], [‘Banana’, ‘7’], [‘Mango’, ‘8’]]
csv.register_dialect(‘myDialect’, delimiter = ‘|’, lineterminator = ‘\n’)
with open(‘c:\\pyprg\\chl3\\line.csv’, ‘w’) as f:
writer = csv.writer(f, dialect=‘myDialect’)
writer.writerows(Data)
f.close( )
When we open the line.csv file, we get following output with spacing between lines:

In the above code, the new dialect “myDialect uses the delimiter=‘|’ where a | (pipe) is considered as column separator. The line terminator=‘\r\n\r\n’ separates each row and display the data after every two lines.

Students can download 6th Social Science Term 2 Geography Chapter 1 Resources Questions and Answers, Notes, Samacheer Kalvi 6th Social Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Social Science Geography Solutions Term 2 Chapter 1 Resources

Samacheer Kalvi 6th Social Science Resources Text Book Back Questions and Answers

A. Match the following

B. Fill in the blanks

1. Sugarcane is processed to make ……………..
2. Conservation of resources is …………….. use of resources.
3. Resources which are confined to certain regions are called ……………..
4. …………….. resources are being used in the present.
5. …………….. resources are the most valuable resources.
6. Collection of resources directly from nature is called ……………..

Answer:

1. Sugar
2. Careful
3. Localized resources
4. Actual
5. Commercial
6. Primary activities

C. Write short notes on the following

Question 1.
Renewable resources
Answer:
After consumption, resources can be renewed with the period of time is called renewable resources.
Example: Air, Water, Sunlight

Question 2.
Human resources.

1. Human resources are groups of individuals who use nature to create more resources.
2. Though human beings are basically natural resources, we classify human beings separately.

Question 3.
Individual resources.
Answer:

1. Individual resources are resources privately owned by individuals.
2. Example: Apartments

Question 4.
Tertiary activities.
Answer:
Tertiary activities are basically concerned with the distribution of primary and secondary products through a system of transport and trade.
(e.g.) Banking, Trade, and Communications.

D. Give brief answers for the following

Question 1.
What are the resources?
Answer:

1. The resource is anything that fulfills human needs. When anything is of some use it becomes valuable.
2. All resources have value.
3. The value can be either commercial or non-commercial.

Question 2.
What are the actual resources?
Answer:
Actual resources are resources that are being used and the quantity available is known, (eg) Coal mining at Neyveli Lignite Corporation.

Question 3.
Define abiotic resources.
Answer:
Abiotic resources are non-living things. Land, Water, Air, and Minerals are abiotic resources.

Question 4.
What is sustainable development?
Answer:

1. Development is necessary without affecting the needs of future generations.
2. If the present needs of resources are met and the conserving of resources for the future is balanced, we call it sustainable development.

E. Give short answers to the following questions

Question 1.
Differentiate universal and localized resources.
Answer:
Universal Resources

1. Universal resources are present everywhere.
2. Eg. Sunlight and air

Localized Resources

1. Localized resources are present in specific regions.
2. Eg. Minerals

Question 2.
Though human beings are natural resources, why are they classified separately?
Answer:

1. Though human beings are basically natural resources, we classify human beings separately.
2. Education, health, knowledge, and skill have made them valuable resources. Eg. Doctors, Scientists, and Teachers

Question 3.
Compare National and International Resources.
Answer:
National resources

1. National resources are resources within the political boundaries and oceanic areas of a country.
2. Eg. Tropical Forest Region of India

International resources

1. International resources are all oceanic resources found in the open ocean. Resources found in the region can be utilized only after an international agreement.
2. Eg. Ambergris.

Question 4.
What is the difference between man-made resources and human resources?
Answer:
Man-made resources

1. Natural resources are modified or processed by technology into man-made resources.
2. Eg. Sugarcane processed to get Sugar
3. All structures built by man can also be called man-made resources.
4. Eg. Bridges, Houses, Road.

Human Resources

1. Human resources are groups of individuals who use nature to create more resources.
2. Through human beings are basically natural resources, we classify human beings separately.
3. Education health knowledge and skill have made them a valuable resource.
4. Eg. Doctors, Teachers, Scientists.

Question 5.
Write the Gandhian thought on conservation of resources.
Answer:
Mahatma Gandhi blamed “human beings” for the depletion of resources because of

1. overexploitation of resources
2. Unlimited needs of human beings. So, conservation is very important.

F. Give detailed answers to the following questions. (100 – 120 words)

Question 1.
How are natural resources classified? Explain any three with examples.
Answer:
Natural resources are classified according to theirs.

1. Origin
2. Development
3. Renewability
4. Distribution
5. Ownership

Question I.
On the basis of origin – Biotic Resources and Abiotic Resources
Answer:

1. All living resources are Biotic resources. Example: Plants, Animals, Microorganisms.
2. Non-living resources are abiotic resources. Example: Land, Water, Air, Minerals

Question II.
On the basis of development – Actual Resources and Potential Resources
Answer:

1. The resources that are being used at present are Actual resources. The quantity is known. Example: Coal at Neyveli.
2. The resources that are not utilized at present are potential resources. The quantity and location are not known.
3. Example: Marine yeast (in the Bay of Bengal and the Arabian Sea)

Question III.
On the basis of Renewability – Renewable Resources and Non – renewable Resouces?
Answer:

1. After consumption, resources can be renewed with the period of time is called renewable resources. Example: Air, Water, Sun Light
2. Natural resources that have limited stock are non – renewable resources. Example: Coal, Petroleum, Natural gas, Minerals

Question 2.
How can resources be conserved?
Answer:

1. Careful use of resources is the conservation of resources.
2. Due to the rapid increase in population the resources are being utilized at a very fast rate.
3. To avoid this we need sustainable development. Sustainable development can take place when
   1. • Wastage and excess consumption is prevented
      • Reusable resources are recycled
      • Pollution is prevented
      • Environment is protected
      • Natural vegetation and wildlife are preserved.
4. The easiest way to conserve resources is to follow the “3R”s: Reduce, Reuse, and Recycle.

Question 3.
What is resource planning and why is it necessary?
Answer:

1. The technique or skill of proper utilization of resources is Resource Planning. Resource Planning is necessary because
2. Resources are limited and we have to use them properly. Also, we have to save the resources for our future generation.
3. Resources are unevenly distributed over the different parts of the world.
4. It is also essential for the production of resources to protect them from overexploitation.

Question 4.
Explain Primary secondary and tertiary activities.
resources, (eg.) Sunlight and air.

(a) Primary Activities

1. They are concerned with the production of raw materials for foodstuff and industrial use.
2. Primary activities include agriculture, cattle rearing, fishing, mining, collection of fruits, nuts, honey, rubber, resin, and medical herbs, etc.

(b) Secondary Activities

1. The raw materials obtained from the primary activities are converted into finished products through machinery on a large scale.
2. These activities are called secondary activities.

(c) Tertiary activities:

1. Tertiary activities are basically concerned with the distribution of primary and secondary products through a system of transport and trade.
2. (Eg): Banking, Trade, and communication.

G. Statements and inferences

Question 1.
Statement: Solar energy is the best substitute for thermal energy in tropical regions.
Inference 1: Coal and petroleum resources are receding.
Inference 2: Solar energy will never deplete.
Now choose the right answer.
(a) Only conclusion 1 follows
(b) Only conclusion 2 follows
(c) Neither 1 nor 2 follows
(d) Both 1 and 2 follow
Answer:
(d) Both 1 and 2 follow

Question 2.
Statement : If you don’t conserve resources, the human race may become extinct.
Inference 1 : You need not conserve resources.
Inference 2 : You need to conserve resources.
Now choose the right answer.
a) Only conclusion 1 follows.
b) Only conclusion 2 follows,
c) Neither 1 nor 2 follows.
d) Both 1 and 2 follow.
Answer:
(b) Only conclusion 2 follows

Question 3.
Statement : Man switched over to agriculture.
Inference 1 : Food gatherers experienced scarcity of food.
Inference 2 : Food gathered was not nutritious.
Now choose the right answer.
(a) Only conclusion 1 follows
(b) Only conclusion 2 follows
(c) Neither 1 nor 2 follows
(d) Both 1 and 2 follow
Answer:
(a) Only conclusion 1 follows

H. Given are three suggestions to conserve resources: Write the 3Rs in suitable places.

1. Giving your childhood cycle to your neighbour
2. Using a flush that consumes less water
3. Melting used plastic to lay roads

Answer:

1. Reuse
2. Reduce
3. Recycle

I. Cross word puzzle

Across left to right:

1. A development that balances time
2. Energy from the sun
3. All resources that belong to a country

Down:

1. A resource found everywhere
2. An international resource
3. A resource provided by nature
4. A resource restricted to specific areas

Across right to left:

1.  One of the 3Rs

Answer:
Across left to right :

1. SUSTAINABLE
2. SOLAR
3. NATIONAL

Down:

1. UNIVERSAL
2. AMBERGRIS
3. NATURAL
4. LOCALIZED

Across right to left:

1. REUSE

K. Identify the different economic activities and fill the table given below

L . Teacher’s Activities

1. Observe “Save Energy Day” Once a month at school/class level
2. Try making wall hangings with waste materials to decorate your school corridors.
3. Find out if there are any industries near your school. A field trip may be arranged.
4. Collect pictures based on
   • Fishing
   • Hunting
   • Food – gathering
   • Forestry
   • Mining
   • Agriculture
   • Cattle – rearing
   • Lumbering

Samacheer Kalvi 6th Social Science Resources Additional Important Questions and Answers

A. Fill in the blanks Answer

1. ……………… are two important factors that determine Time and Technology whether a substance is a resource or not.
2. All resources that have been directly provided by Natural resources nature are called ………………
3. Man mined precious metals simultaneously for making ………………
4. The non – renewable resources become ……………… after use and the time they take to replace does not match the life cycle.
5. Ambergris is used in ……………… industries.
6. Marine yeast has greater potential than ……………… yeast.

Answer:

1. Time and Technology
2. Natural resources
3. ornaments
4. exhausted
5. perfume
6. terrestrial

B. Write short notes on the following

Question 1.
Non – renewable resources.
Answer:

1. Natural resources that have limited stock are non – renewable resources.
2. Example: Goal, Petroleum

Question 2.
Community-owned Resources.
Answer:

1. Community-owned resources are resources which can be utilised by all the members of the community.
2. Eg. Public Parks.

Question 3.
World’s largest Pharmacy.
Answer:

1. Tropical rain forests are called the world’s largest pharmacy.
2. 25% of the natural vegetation are medicinal plants. Example: Cinchona.

C. Give brief answers for the following

Question 1.
How can natural resources be classified depending on?
Answer:

1. Origin
2. Development
3. Renewability
4. Distribution
5. Ownership

Question 2.
What is an abiotic resource?
Answer:

1. Abiotic resources are non-living things.
2. Land, Water, Air, and minerals are abiotic resources.

D. Mind Map

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Tamilnadu Samacheer Kalvi 6th Social Science History Solutions Term 2 Chapter 1 Vedic Culture in North India and Megalithic Culture in South India

Samacheer Kalvi 6th Social Science Vedic Culture in North India and Megalithic Culture in South India Text Book Back Questions and Answers

I. Choose the correct answer

Question 1.
Aryans first settled in …………… region.
(a) Punjab
(b) Middle Gangetic
(c) Kashmir
(d) Northeast
Answer:
(a) Punjab

Question 2.
Aryans came from
(a) China
(b) North Asia
(c) Central Asia
(d) Europe
Answer:
(c) Central Asia

Question 3.
Our National Motto “Sathyameva Jayate” is taken from ……………
(a) Brahmana
(b) Veda
(c) Aranyaka
(d) Upanishad
Answer:
(d) Upanishad

Question 4.
What was the ratio of land revenue collected during the Vedic Age
(a) 1/3
(b) 1/6
(c) 1/8
(d) 1/9
Answer:
(b) 1/6

II. Match the Statement with the Reason/ Tick the appropriate answer

Question 1.
Assertion: The Vedic age is evidenced by a good number of texts and an adequate amount of material evidence.
Reason: Shrutis comprise the Vedas, the Brahmanas, the Aranyakas, and the Upanishads.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer:
(d) A is false but R is true

Question 2.
Statement I: Periplus mentions the steel imported into Rome from peninsular India was subjected to duty in the port of Alexandria.
Statement II: Evidence for iron smelting has come to light at Paiyampalii.
(a) Statement I is wrong.
(b) Statement II is wrong.
(c) Both the statements are correct,
(d) Both the statements are wrong.
Answer:
(c) Both the statements are correct

Question 3.
Which of the statement is not correct in the Vedic society.
(a) A widow could re-marry.
(b) Child marriage was in practice.
(c) Father’s property was inherited by his son
(d) Sati was unknown
Answer:
(b) Child marriage was in practice

Question 4.
Which is the correct ascending order of the Rig Vedic society?
(a) Grama < Kula < Vis < Rashtra < Jana
(b) Kula < Grama < Vis < Jana < Rashtra
(c) Rashtra < Jana < Grama < Kula < Vis
(d) Jana Grama < Kula < vis < Rashtra
Answer:
(d) Jana Grama < Kula < vis < Rashtra

III. Fill in the blanks

1. Vedic culture was ……………. in nature.
2. ……………. was a tax collected from the people in the Vedic period.
3. ……………. system is an ancient learning method.
4. Adhichanallur is in ……………. district.

Answer:

1. Chalcolithic
2. Bali
3. Gurukula
4. Thoothukudi

IV. True or False

1. The Roman artifacts found at various sites provide evidence of Indo – Roman trade relations.
2. A Hero Stone is a memorial stone raised in remembrance of the honourable death of a hero.
3. The army chief was called Gramani.
4. The Black and Red ware pottery became the characteristic of the Megalithic period.
5. Evidence for iron smelting has come to light at paiyampalli.

Answer:

1. True
2. True
3. False
4. True
5. True

V. Match the following

Answer:
(d) 1 2 3 4

VI. Answer in one or two sentences

Question 1.
Name the four Vedas.
Answer:
The four Vedas are Rig, Yajur, Sama and Atharva.

Question 2.
What were the animals domesticated by Vedic people?
Answer:
Horses, cows, goats, sheep, oxen, and dogs were domesticated. In the later Vedic period the Aryans tamed elephants also.

Question 3.
What do you know about Megalith?
Answer:
The term ‘Megalith’ is derived from Greek. ‘Megas’ means great and ‘lithos’ means stone. Using big stone slabs built upon the places of burial is known as Megalith.

Question 4.
What are Dolmens?
Answer:
Dolmens are Megalithic tombs made of two or more upright stones with a single stone lying across the burial site.

Question 5.
What are Urns?
Answer:
Urns are large pottery jars used for burying the dead.

Question 6.
Name the coins used for business transactions in the Vedic period.
Answer:
Nishka, Satmana (gold coins), and Krishna (silver coins) were used for business transactions.

Question 7.
Name some Megalithic monuments found in Tamil Nadu.
Answer:

1. Dolmens
2. Menhir

Dolmens are Megalithic tombs. Megalithic Dolmens have been found in Veeraraghavapuram village, Kanchipuram district, Kummalamaruthupatti, Dindigulfc, district, and in Narasingampatti, Madurai district.

VII. Answer the following

Question 1.
Write briefly about the archaeological site at Kodumanal.

1. Kodumanal is located in the Erode district.
2. More than 300 pottery inscriptions in Tamil – Brahmi have been discovered there.
3. Archaeologists have also discovered spindles, whorls (used for making thread from cotton)
4. Pieces of cloth, along with tools, weapons, ornaments, beads, particularly camelina also discovered here.
5. A Menhir found at the burial site is assigned to the Megalithic period.

Question 2.
Write about the Vedic women in a paragraph.
Answer:

1. In the Rig Vedic society, women relatively enjoyed some freedom.
2. The wife was respected as the mistress of the household.
3. She could perform rituals in her house.
4. In Rig Vedic period widows could remarry.
5. But they were denied to inherit parental property.
6. They played no role in public affairs.
7. In the later Vedic period women’s position declined, demand to perform rituals and marriage rules became more rigid.
8. Polygamy became common, and women were denied an education.

VIII. HOTS

Question 1.
Difference between the Gurukula system of education and the Modern system of education.
Answer:

1. Apart from the Modern system of education, the Gurukula system is an ancient learning method.
2. The shishas resided with their guru and served them and simultaneously learned and gained knowledge.
3. The students received education through oral tradition. They had to memorize everything.
4. Four Vedas, Ithihasas, Puranas, Grammar, Logic, Ethics, Astrology, Maths, and Military Science were the subjects taught.
5. Only Dvijas could be students and they were trained to lead a disciplined life.

IX. Pride any joy – Let us find out the fact

X. Student Activity

Question 1.
Sentence making by using these new words. Shruti, Gramani, Rashtras, Iron Age, Semi-nomadic, Barter
Answer:

1. The one that was transmitted orally through generations is Shruti.
2. Gramani was the leader of the village.
3. Many Janas formed the Rashtra.
4. Iron Age society in South India belongs to the Vedic period in North India.
5. Rig Vedic Aryans were Semi-nomadic.
6. The barter system was prevalent in the Rig Vedic Period.

Question 2.
Word Search

Answer:

1. KHYBER
2. SMRITI
3. VIS
4. GANA
5. SAMITI
6. AGNI
7. SATMANA
8. IRON AGE
9. URN

XI. Life Skill

1. Collect information from Newspapers about archaeological finds with the help of your teacher.
2. Site Visit: Visit any one of the archaeological sites near your locality.

XII. Answer Grid

Question 1.
Mention two Ithikasas:
Answer:

1. Ramayana
2. Mahabharatha

Question 2.
Vertical monolithic pillar planted in memory of the dead is called …………….
Answer:
Menhir

Question 3.
Name the ancient town in the Sivagangai district dating to the Sangam age.
Answer:
Keezhadi

Question 4.
Name any two Iron Age sites in Tamilnadu
Answer:

1. Paiyampalli
2. Porunthal

Question 5.
What method of agriculture was practiced by early Aryans?
Answer:

1. Slash and burn
2. agriculture

Question 6.
Name two large cities that emerged during the Vedic period.
Answer:

1. Ndraprastha
2. Ayodhya

Samacheer Kalvi 6th Social Science Vedic Culture in North India and Megalithic Culture in South India Additional Important Questions and Answers

I. Choose the correct answer

Question 1.
The main occupation of the Aryans was ……………
(a) Agriculture
(b) Fishing
(c) Cattle rearing
(d) Hunting
Answer:
(c) Cattle rearing

Question 2.
The main source of wealth in the Rig Vedic period was ______
(a) Land
(b) Gold coins
(c) Cattle
(d) Rice
Answer:
(c) Cattle

Question 3.
The staple crop was ……………
(a) Barley
(b) Wheat
(c) Rice
(d) Cotton
Answer:
(a) Barley

Question 4.
Vishayapati was the head of a ______
(a) Rashtra
(b) Village
(c) Clan
(d) Jana
Answer:
(c) Clan

II. Fill in the blanks

1. Within the early Vedic Society there were …………… divisions.
2. When Aryans settled permanently they began to practice……………
3. The rules of …………… became much more complex and rigid.

Answer:

1. three
2. agriculture
3. marriage

III. True or False

1. Rig Vedic Aryans worshipped mostly the earthly and celestial gods.
2. True Education was denied to women.
3. The term ‘Megalith’ is derived from Latin.

Answer:

1. True
2. True
3. False

IV. Match the following

Question 1.

Answer:
(b) 2 4 1 3

V. Answer in one or two sentences

Question 1.
Name the metals known to Rig Vedic People.
Answer:

1. Gold (Hiranya)
2. Iron (Shyama)
3. Copper / Bronze (Ayas)

Question 2.
What are Shrutis?
Answer:

1. The Shmtis comprise the four Vedas, the Brahmanas, the Aranyakas, and the ’ Upanishads.
2. They are considered sacred, eternal, and unquestionable truth.

Question 3.
Name the occupations of Rig Vedic Aryans.
Answer:

1. Cattle rearing
2. Carpenters
3. Chariot makers
4. Potters
5. Smiths
6. Weavers
7. Leather Workers

VI. Mind map

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TN State Board 12th Computer Sceince Model Question Paper 4 English Medium

General Instructions:

1. The question paper comprises of four parts.
2. You are to attempt all the parts. An internal choice of questions is provided wherever applicable.
3. All questions of Part I, II, III and IV are to be attempted separately.
4. Question numbers 1 to 15 in Part I are Multiple Choice Questions of one mark each.
   These are to be answered by choosing the most suitable answer from the given four alternatives and writing the option code and the corresponding answer
5. Question numbers 16 to 24 in Part II are two-mark questions. These are to be answered in about one or two sentences.
6. Question numbers 25 to 33 in Part III are three-mark questions. These are to be answered in about three to five short sentences.
7. Question numbers 34 to 38 in Part IV are five-mark questions. These are to be answered in detail Draw diagrams wherever necessary.

Time: 3 Hours
Maximum Marks: 70

PART – 1

Choose the correct answer. Answer all the questions: [15 × 1 = 15]

Question 1.
Why is the function random( ) is a impure function?
(a) It gives different outputs for same function call
(b) It gives different outputs when 0 is given
(c) It will not give different output
Answer:
(a) It gives different outputs for same function call

Question 2.
The process of subdividing a computer program into separate sub-programs is called ……………….
(a) Procedural Programming
(b) Modular programming
(c) Event Driven Programming
(d) Object oriented Programming
Answer:
(b) Modular programming

Question 3.
If a problem can be broken into subproblems which are reused several times, the problem possesses which property?
(a) Overlapping subproblems
(b) Optimal substructure
(c) Memoization
(d) Greedy
Answer:
(a) Overlapping subproblems

Question 4.
Ox represents ………………. integer.
(a) Binary
(b) Hexadecimal
(c) Decimal
(d) Octal
Answer:
(b) Hexadecimal

Question 5.
Which amongst this is not a Jump Statement?
(a) For
(b) Goto
(c) Continue
(d) Break
Answer:
(a) For

Question 6.
Which is the optional part in range?
(a) Start
(b) Stop
(c) Step
(d) Iner
Answer:
(c) Step

Question 7.
Which function is used to change all occurances of a particular character in a string?
(a) Replace ( )
(b) Change ( )
(c) Edit ( )
(d) Append( )
Answer:
(a) Replace ( )

Question 8.
The default value of stride is …………………
(a) 0
(b) 1
(c) n
(d) n-1
Answer:
(b) 1

Question 9.
The mixed collection of elements are called ………………
(a) List
(b) Tuples
(c) Sets
(d) Dictionary
Answer:
(d) Dictionary

Question 10.
Class members are accessed through ……………. operators
(a) &
(b) .
(c) #
(d) %
Answer:
(b) .

Question 11.
Find the wrong pair.
(a) Union U
(b) Project π
(c) Select σ
(d) Cartesian product P
Answer:
(d) Cartesian product P

Question 12.
The update command specifies the rows to be changed using …………………
(a) Where
(b) Why
(c) What
(d) How
Answer:
(a) Where

Question 13.
In open command, file name can be represented in ………………..
(a) ” ”
(b) ‘ ‘
(c) $
(d) both (a) & (b)
Answer:
(d) both (a) & (b)

Question 14.
Which command of OS module executes the exe files?
(a) Run
(b) System ( )
(c) Main
(d) Name
Answer:
(b) System ( )

Question 15.
The SQL commands have to be defined with ………………… quotes.
(a) Single
(b) Double
(c) Triple
(d) No quote
Answer:
(c) Triple

PART – II

Answer any six questions. Question No. 21 is compulsory. [6 × 2 = 12]

Question 16.
Write the inference you get from X:=78 ?
Answer:
Value 78 being bound to the name X.

Question 17.
Write note on Definitions?
Answer:
Definitions bind values to names, Definitions are not expressions, Definitions are distinct syntactic blocks. Definitions can have expressions nested inside them, and vice-versa.

Question 18.
What is a Pair? Give an example?
Answer:
Pair is a compound structure which is made up of list or Tuple. lst[(0, 10), (1,20)] -where

Any way of bundling two values together into one can be considered as a pair. Lists are a common method to do so. Therefore List can be called as Pairs.

Question 19.
Define fixed part in the space complexity?
Answer:
A fixed part is defined as the total space required to store certain data and variables for an algorithm. For example, simple variables and constants used in an algorithm.

Question 20.
Name the different types of alternative statements in Python?
Answer:
Python provides the following types of alternative or branching statements:

1. Simple if statement
2. if..else statement
3. if.elif statement

Question 21.
Find output:

1. abs (-25 + 12.0)
2. abs (-3.2).

Answer:
Output:

1. 13
2. 3.2

Question 22.
Give the syntax for passing parameters in functions?
Answer:
Parameters or arguments can be passed to functions.
Syntax:
def function_name (parameters) separated by comma):

Question 23.
Differentiate del with remove( ) function of List?
Answer:
There are two ways to delete an element from a list viz. del statement and remove() function, del statement is used to delete known elements whereas remove() function is used to delete elements of a list if its index is unknown. The del statement can also be used to delete entire list.

Question 24.
What is instantiation?
Answer:
Once a class is created, next you should create an object or instance of that class. The process of creating object is called as “Class Instantiation”.
Syntax:
objectname = class_name( )

PART – III

Answer any six questions. Question No. 29 is compulsory. [6 × 3 = 18]

Question 25.
What are class members? How do you define it?
Answer:
In Python, a class is defined by using the keyword class. Every class has a unique name followed by a colon (:).
Syntax:
class class name:
statement_1
statement_2
statement
…….
……
statement_n
Where, statement in a class definition may be a variable declaration, decision control, loop or even a function definition. Variables defined inside a class are called as “Class Variable” and functions are called as “Methods”. Class variable and methods are together known as members of the class. The class members should be accessed through objects or instance of class. A class can be defined anywhere in a Python program.

Example: Program to define a class
class Sample:
x, y = 10, 20 # class variables
In the above code, name of the class is Sample and it has two variables x and y having the initial value 10 and 20 respectively. To access the values defined inside the class, you need an object or instance of the class.

Question 26.
What is meant by data model?
Answer:

• A data model describes how the data can be represented and accessed from a software after complete implementation
• It is a simple abstraction of complex real world data gathering environment.
• The main purpose of data model is to give an idea as how the final system or software will look like after development is completed.

Question 27.
Write the use of Savepoint command with an example?
Answer:
SAVEPOINT command:
The SAVEPOINT command is used to temporarily save a transaction so that you can rollback to the point whenever required. The different states of our table can be saved at anytime using different names and the rollback to that state can be done using the ROLLBACK command.
SAVEPOINT savepoint_name;
UPDATE Student SET Name = ‘Mini ’ WHERE Admno=105;
SAVEPOINT A;

Question 28.
Write a program to count the number of male and female students from the student table?
Example:
Answer:
import sqlite3
connection= sqlite3.connect(“Academy.db”)
cursor = connection. cursor( )
cursor. execute(” SELECT gender,count(gender) FROM student Group BY gender”)
result = cursor. fetchall( )
print(*result,sep=”\n”)

Output:
(‘F’, 2)
(‘M’, 5)

Question 29.
What will be the output of the given python program?
Answer:
str1 = “welcome”
str2 = “to school”
str3 = str 1 [: 2]+str2 [len(str2)-2:]
print(str3)

Output:
weool

Question 30.
Write any 6 delimiters in python?
Answer:

Question 31.
What are string literals? Explain?
Answer:
In Python a string literal is a sequence of characters surrounded by quotes. Python supports single, double and triple quotes for a string. A character literal is a single character surrounded by single or double quotes. The value with triple-quote is used to give multi-line string literal.

strings = “This is Python”
char = “C”
multilinestr = ‘”This is a multiline string with more than one line code.'”

Question 32.
Give an example program for Ternary operator?
Answer:
# Program to demonstrate conditional operator
a, b = 30, 20
# Copy value of a in min if a < b else copy b
min = a if a < b else b
print (“The Minimum of A and B is “,min)
# End of the Program

Output:
The Minimum of A and B is 20

Question 33.
Write a note about count( ) function in python?
Answer:

PART – IV

Answer all the questions. [5 × 5 = 25]

Question 34(a).
Write the Output for the given program?
Answer:

[OR]

(b) Write a python program to check whether the given number is odd or even?
Example: #Program to check if the accepted number odd or even?
Answer:
a = int(input(“Enter any number :”))
if a%2==0:
print (a, ” is an even number”)
else:
print (a, ” is an odd number”)

Output 1:
Enter any number :56 56 is an even number

Output 2:
Enter any number :67 67 is an odd number

Question 35(a).
Explain while loop with sample program?
Answer:
Syntax:
while <condition>:
statements block 1
[else:
statements block 2]

In the while loop, the condition is any valid Boolean expression returning True or False. The else part of while is optional part of while. The statements blockl is kept executed till the condition is True. If the else part is written, it is executed when the condition is tested False. Recall while loop belongs to entry check loop type, that is it is not executed even once if the condition is tested False in the beginning.

Example: program to illustrate the use of while loop – to print all numbers from 10 to 15

Output:
10 11 12 13 14 15

[OR]

(b) Explain the following built-in functions?
Answer:

Question 36 (a).
Evaluate the following function and write the output?

1. forinat(66, ‘c’)
2. format(10, ‘x’)
3. format(10, ‘X’)
4. format(0bll0, ‘d’)
5. format(0xa, ‘d’)

Answer:

1. B
2. a
3. A
4. 6
5. 10

[OR]

(b) Write a program to swap two strings?
Answer:
print(“Enter ‘x’ for exit.”)
string 1 = input(“Enter first string : “)
if string 1 = = ‘x’: exit));
else:
string2 = input(“Enter second string : “)
print(” \n Both strings before swap : “)
print(“First string = ” , string1)
print(” Second string = ” , string2)
temp = string1 string1 = string2
string2 = temp
print(“\n Both strings after swap : “)
print(“First string = ” , string1)
print(” Second string = “, string2)

Output:
Enter ‘X’ for exit
Enter first string : code
Enter second string : python
Both strings before swap:
First string = code Second string = python Both strings after swap:
First string = python Second string = code

Question 37 (a).
Write a program to create a list of numbers in the range 1 to 20. Then delete all the numbers from the list that are divisible by 3?
Answer:
num = [ ]
for x in range(1, 21):
num.append(x)
print(“The list of numbers from 1 to 20 =”, num) for index, i in enumerate(num):
if(i % 3 == 0)
del num[index]
print(“The list after deleting numbers”, num)

Output:
The list of numbers from 1 to 20 = [1,2,3,4… 20]
The list after deleting numbers[l, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20]

[OR]

(b) Write a program using class to store name and marks of students in list and print total marks?
Answer:
class stud:
def_init_(self):
self.name=” ”
self.m1=0
self.m2=0
self.tot=0
def gdata(self):
self.name = input(“Enter your name”)
self.m1 = int(input(“Enter marks 1”))
self.m2 = int(input(“Enter marks2”))
self, tot = self.m1 + self.m2
def disp(self):
print(self.name)
print(self.m1)
print(self.m2)
print(self.tot)
mlist = [ ]
st = stud( )
st.gdata( )
mlist.append(st)
for x in mlist:
x.disp( )

Output:

Question 38.
Write the different types of constraints and their functions?
Answer:
Constraints ensure database integrity, therefore known as database integrity constraints.

(I) Unique Constraint:
This constraint ensures that no two rows have the same value in the specified columns. For example UNIQUE constraint applied on Admno of student table ensures that no two students have the same admission number and the constraint can be used as:

CREATE TABLE Student
(
Admno integer NOT NULL UNIQUE → Unique constraint
Name char (20) NOT NULL,
Gender char (1),
Age integer,
Place char (10),
);

The UNIQUE constraint can be applied only to fields that have also been declared as NOT NULL.

When two constraints are applied on a single field, it is known as multiple constraints. In the above Multiple constraints NOT NULL and UNIQUE are applied on a single field Admno, the constraints are separated by a space and at the end of the field definition a comma(,) is added. By adding these two constraints the field Admno must take some value i.e. will not be NULL and should not be duplicated.

(II) Primary Key Constraint:
This constraint declares a field as a Primary key which helps to uniquely identify a record. It is similar to unique constraint except that only one field of a table can be set as primary key. The primary key does not allow NULL values and therefore a field declared as primary key must have the NOT NULL constraint.
Example showing Primary Key Constraint in the student table:
CREATE TABLE Student
(
Admno integer NOT NULL PRIMARY KEY, → Primary Key constraint
Name char(20)NOT NULL,
Gender char(I),
Age integer,
Place char(10),
);

In the above example the Admno field has been set as primary key and therefore will help us to uniquely identify a record, it is also set NOT NULL, therefore this field value cannot be empty,

(III) DEFAULT Constraint:
The DEFA ULT constraint is used to assign a default value for the field. When no value is given for the specified field having DEFA ULT constraint, automatically the default value will be assigned to the field.
Example showing DEFAULT Constraint in the student table:
CREATE TABLE Student
(
Admno integer NOT NULL PRIMARY KEY,
Name char(20) NOT NULL,
Gender char(1),
Age integer DEFAULT = “17”, → Default Constraint Place char(10),
); –
In the above example the “Age” field is assigned a default value of 17, therefore when no
value is entered in age by the user, it automatically assigns 17 to Age.

(IV) Check Constraint:
This constraint helps to set a limit value placed for a field. When we define a check constraint on a single column, it allows only the restricted values on that field.
Example showing check constraint in the student table:
CREATE TABLE Student
(
Admno integer NOT NULL PRIMARY KEY
Name char(20)NOT NULL,
Gender char(1),
Age integer (CHECK<=19), → Check Constraint Place char(10),
);
In the above example the check constraint is set to Age field where the value of Age must be less than or equal to 19.

Note:
The check constraint may use relational and logical operators for condition.

(V) TABLE CONSTRAINT:
When the constraint is applied to a group of fields of the table, it is known as Table constraint. The table constraint is normally given at the end of the table definition. Let us take a new table namely Student 1 with the following fields Admno, Firstname, Lastname, Gender, Age, Place:

CREATE TABLE Student 1
(
Admno integer NOT NULL,
Firstname char(20),
Lastname char(20),
Gender char(1),
Age integer,
Place char(10),
PRIMARY KEY (Firstname, Lastname) → Table constraint
);
In the above example, the two fields, Firstname and Lastname are defined as Primary key which is a Table constraint.

[OR]

(b) Write a C++ program to print boundary elements of a matrix and name the file as Border.cpp. Write a python program to execute the Border.cpp?
Answer:
Select File → New in Notepad and type the C++ program.
#include<iostream>
#include<bits/stdc++.h>
using namespace std;
const int MAX = 100;
void printBoundary(int a[ ][max], int m, int n)
{
for (int i=0; i < m; i++)
{
for(int j=0; j < n; j++)
{
if(i= =0 || j= =0 || i= =n-l || j= =n-1)
cout<<a[i][j] <<” ”
else
cout« ” ”
cout« ” ”
}
cout<<” \n”;
}}
int main( )
{
inta[4][MAX] = { {1 ,2, 3, 4}, {5, 6, 7, 8}, {1, 2, 3, 4}, {5, 6, 7, 8}};
print Boundary(a, 4, 4);
return 0;
}
save it as Border.cpp
open a New notepad file and type the python program to execute border.cpp
#python border.py -i border.cpp
import sys,os,getopt
def main(argv):
cppfile =” exe_file =”
opts, args = getopt.getopt(argv, “i:”,[‘ifile=’])
for o, a in opts: if o in(“-i”, “-ifile”):
cppfile =a+ ‘.cpp’
exefile = a+ ‘.exe’
run(cpp file, exe file)
def run(cpp_file, exe file):
print(“Compiling” + cppfile) os.system(‘g++’+ cpp file + ‘-o ‘+ exe file)
print(“Running” + exefile)
print(” “)
print
os.system(exe_file)
print
if name =’ main ‘:
main(sys.argv[l:])
Output:

Students can download 6th Social Science Term 2 History Chapter 3 From Chiefdoms to Empires Questions and Answers, Notes, Samacheer Kalvi 6th Social Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Social Science History Solutions Term 2 Chapter 3 From Chiefdoms to Empires

Samacheer Kalvi 6th Social Science From Chiefdoms to Empires Text Book Back Questions and Answers

I. Choose the correct answer

Question 1.
The Kingdom which was most powerful among the four Mahajanapadas …………….
(a) Anga
(b) Magadha
(c) Kosala
(d) Vajji
Answer:
(b) Magadha

Question 2.
Among the following who was the contemporary of Gautama Buddha?
(a) Ajatasatru
(b) Bindusara
(c) Padmanabha Nanda
(d) Brihadratha
Answer:
(a) Ajatasatru

Question 3.
Which of the following are the sources of Mauryan period?
(a) Artha Sastra
(b) Indica
(c) Mudrafakshasa
(d) All
Answer:
(d) All

Question 4.
Chandra Gupta Maurya abdicated the thrown and went to Sravanbelgola along with Jina Saint ; .
(a) Badrabahu
(b) Stulabahu
(c) Parswanatha
(d) Rushabhanatha
Answer:
(a) Badrabahu

Question 5.
……………. was the ambassador of Seleucus Nicator.
(a) Ptolemy
(b) Kautilya
(c) Xerxes
(d) Megasthenese
Answer:
(d) Megasthenese

Question 6.
Who was the last emperor of the Mauryan Dynasty?
(a) Chandragupta Maurya
(b) Ashoka
(c) Brihadratha
(d) Bindusara
Answer:
(c) Brihadratha

II. Match the Statement with the reason/ Tick the appropriate answer

Question 1.
Statement (A) : Ashoka is considered as one of India’s greatest rulers.
Reason (R) : He ruled according to the principle of Dhamma.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false
(d) A is false but R is true
Answer:
(b) Both A and R are true but R is not the correct explanation of A

Question 2.
Which of the statements given below is/are correct?
Statement 1 : Chandragupta Maurya was the first ruler who unified entire India under one political unit.
Statement 2 : The Arthashastra provides information about the Mauryan administration.
(a) only 1
(b) only 2
(c) both 1 and 2
(d) neither 1 nor 2
Answer:
(b) only 2

Question 3.
Consider the following statements and find out which of the following statement(s) is/are correct.
1. Chandragupta Maurya was the first king of Magadha.
2. Rajagriha was the capital of Magadha.
(a) only 1
(b) only 2
(c) both 1 and 2
(d) neither 1 nor 2
Answer:
(c) both 1 and 2

Question 4.
Arrange the following dynasties in chronological order.
(a) Nanda – Sishunaga – Haryanka – Maurya
(b) Nanda – Sishunaga – Maurya – Haryanka
(c) Haryanka – Sishunaga – Nanda – Maurya
(d) Sishunaga – Maurya – Nanda – Haryanka
Answer:
(c) Haryanka – Sishunaga – Nanda – Maurya

Question 5.
Which of the following factors contributed to the rise of Magadhan Empire?
(1) Strategic location
(2)Thick forest supplied timber and elephant
(3) Control over sea
(4) Availability of rich deposits of iron ores
(a) 1, 2 and 3 only
(b) 3 and 4 only
(c) 1, 2 and 4 only
(d) All of these
Answer:
(c) 1,2 and 4 only

III. Fill in the blanks

1. …………….. was the earliest capital of Magadha.
2. Mudrarakshasa was written by …………….
3. ……………. was the son of Bindusara.
4. The founder of the Maurya Empire was …………….
5. ……………. were appointed to spread Dhamma all over the empire.

Answer:

1. Rajagriha
2. Visakadatta
3. Ashoka
4. Chandragupta Maurya
5. Dhamma – mahamattas

IV. State True or False

1. The tittle Devanam Piya was given to Chandragupta Maurya.
2. Ashoka gave up war after his defeat in Kalinga.
3. Ashoka’s Dhamma was based on the principle of Buddhism.
4. The lions on the currency notes is taken from the Rampurwa bull capital.
5. Buddha’s relics were placed in the centre of the Stupas.

Answer:

1. False
2. False
3. True
4. False
5. True

V. Match the following

Answer:
(a) 3 4 1 2

VI. Answer in one or two sentences

Question 1.
Mention any two literary sources of the Mauryan period.
Answer:

1. Secular Literature
2. Religious Literature: Vedic, Jain, Buddhist texts and Puranas

Question 2.
What is a stupa?

1. A Stupa is a semi-spherical dome-like structure constructed on brick or stone.
2. The Buddha’s relics were placed in the centre of the dome.

Question 3.
Name the dynasties of Magadha.
Answer:
Four dynasties ruled over Magadha Empire.

1. The Haryanka dynasty
2. The Shishunaga dynasty
3. The Nanda dynasty
4. The Maurya dynasty

Question 4.
What were the sources of revenue during the Mauryan period?
Answer:
(i) The land was the most important source of revenue for the state. Ashokan inscription at Lumbini mentions Bali and bagha as taxes collected from people. The land tax (Bhaga) collected was 1/6 of the total produce.
(ii) Revenue from taxes on forests, mines, salt, and irrigation provided additional revenue to the government.

Question 5.
Who assisted Nagarika in the administration of towns?
Answer:
Sthanika and Gopa assisted Nagarika in the administration of towns.

Question 6.
What do you know from the Rock Edicts II and XIII of Ashoka?
Answer:

1. The horror of the Kalinga war was described by the king himself in the Rock Edict XIII.
2. The Rock Edicts II and XIII of Ashoka refer to the names of the three dynasties namely Pandyas, Cholas, the Keralaputras, and the Sathyaputras.

Question 7.
Which classical Tamil poetic works have the reference of Mauryans?
Answer:
Mamulahar’s poem in Agananuru gives the reference of the Mauryans.

VII. Answer the following

Question 1.
What did Ashoka do to spread Buddhism? (Write any three points)
Answer:

1. Ashoka sent his son Mahinda and daughter Sanghamitta to Srilanka to propagate Buddhism.
2. He also sent missionaries to West Asia, Egypt, and Eastern Europe to spread the message of Dhamma.
3. The Dhamma-mahamattas was a new cadre of officials created by Ashoka.
4. Their job was to spread dhamma all over the empire.
5. Ashoka held the third Buddhist council at his capital pataliputra.

Question 2.
Write any Hire causes for the rise off Mapdk
Answer:
The Causes for the Rise of Magadha

1. Magadha was located on the lower part of the Gangetic plain.
2. The plain was fertile which ensured the rich agricultural yield.
3. This provided regular and substantial income to the state.
4. The thick forests supplied timber for the construction of buildings and elephants for the army.
5. The abundance of natural resources especially iron enabled them to equip themselves with weapons made of iron.

VIII. HOTS

Question 1.
Kalinga war became a turning point in Ashoka’s life. How?
Answer:

1. In the war of Kalinga, many people died.
2. He understood that war only brings destruction to families.
3. The Kalinga war had incredible influence over the personal life and policy of Ashoka.
4. Hence Kalinga war proved to be a turning point in the life of Ashoka.
5. He found his consolation in Buddhism.
6. He was representing for his deeds. He embraced Buddhism and took the vow of inculcation ‘Dhamma’ to all men throughout his life.
7. He gave up the policy of Dig Vijay and adopted the policy of Dharma Vijay.

Question 2.
Write any five welfare measures you would do If you were a Mug like Ashoka?
Answer:
If I were a king like Ashoka

1. First I would have taken proper steps to help the cultivations, especially storing j the excess water available in rainy season for agriculture.
2. Monetary compensation would have been given during natural calamities.
3. Child protection act would be passed very effectively.
4. Stringent punishments would be given against corruption.
5. Suggestions would have been taken from the general public for quality improvement.

IX. Picture Study

This is the picture of Ashokan edicts.

Question a.
What are edicts?
Answer:
Edicts are official proclamations issued by authority or a king.

Question b.
How are Ashokan edicts useful?
Answer:
Ashokan edicts showed his belief in peace, righteousness, justice, and his concern for the welfare of his people.

Question c.
Where were these edicts inscribed?
Answer:
Edicts were inscribed on the pillars, boulders and cave walls.

Question d.
Name the script used in Sanchi Inscription.
Answer:
Brahmi

Question e.
How many Rock Edicts are there?
Answer:
33 Edicts

X. Who am I

Question 1.
I belonged to Haryanka dynasty. I extended territory by matrimonial alliances. My son is Ajatasatru – Who am I?
Answer:
Bimbisara

Question 2.
I played a significant role in the transformation of society. I am used to making ploughshare – Who am I?
Answer:
Iron

Question 3.
I was known as Devanampiya. I embraced the path of peace – Who am I?
Answer:
Ashoka

Question 4.
I established the first largest empire in India. I performed Sallekhana – Who am I?
Answer:
Chandragupta Maurya.

Question 5.
I am found in the Lion Capital of Ashoka. I am at the centre of our national flag – Who am I?
Answer:
The Ashoka Chakra

XI. Decipher the code – The Mauryan Empire

Answer:

1. The first dynasty that ruled over Magadha was ……………… (8, 1, 18, 25, 1, 14, 11, 1)
2. ………………empire was the first largest empire. (13, 1, 21, 18, 25, 1)
3. ……………… laid the foundation of the new capital at Pataliputra. (21, 4, 1, 25, 9, 14)
4. ……………… was one of the main exports (19, 16, 9, 3, 5, 19)
5. ……………… bacame later the most renowned seat of learning. (14, 1, 12, 1, 14, 4, 1)
6. Revenue from agricultural produce was called ……………… (2, 8, 1, 7, 1)
7. The horror of war was described in ……………… (18, 15, 3, 11, 5, 4, 9, 3, 20)
8. Greeks called Bindusara as ………………  (1, 13, 9, 20, 18, 1, 7, 1, 20, 8.1)
9. The crowning element in Saranath Pillar is ……………… (4, 8, 1, 18, 13, 1, 3, 8, 1, 11, 18, 1)
10. Council of ministers were known as ……………… (13, 1, 14, 4, 18, 9, 16, 1, 18, 9, 19, 8, 1, 4)

Answer:

1. Haryanka
2. Maurya
3. Udayin
4. Spices
5. Nalanda
6. Rhaga
7. Rockedict
8. Amitragatha
9. Dharma Chakra
10. Mantriparishad

XII. Activity (For Students)

1. Field trip to Museum
2. Movie show – about Ashoka and Chandragupta

XIV. Life Skill (For Students)

1. Make a model of Ashoka Chakra
2. Make a model of Sanchi Stupa
3. Draw and colour our National Flag.

XV. Answer Grid

Question 1.
Name the two kinds of government in North India during 6th century B.C. (BCE)
Answer:
Gana – Sanghas and Kingdoms

Question 2.
Who conducted second Buddhist Council at Vaishali?
Answer:
Kalasoka

Question 3.
What is the modern name for Kalinga?
Answer:
Odisha

Question 4.
Town was administrated by …………….
Answer:
Nagarika

Question 5.
Where was the third Buddhist council convened by Ashoka?
Answer:
Pataliputra

Question 6.
Name any two major Mahajanapadas.
Answer:
Magadha, Avanti

Question 7.
Which inscription records the Construction of Sudarshana lake?
Answer:
Junagath Girnar

Question 8.
Who was the last Nanda ruler?
Answer:
Dhana Nanda Maurian period.

Question 9.
Name the silver coin which was in use during the Mauryan Period.
Answer:
Panas

Samacheer Kalvi 6th Social Science From Chiefdoms to Empires Additional Important Questions and Answers

I. Choose the correct answer

Question 1.
Mahajanapadas dotted the Indo – Gangetic plain in sixth century BC.
(a) Ten
(b) Fourteen
(c) Sixteen
(d) eighteen
Answer:
(c) Sixteen

Question 2.
Kosala, one of the Mahajanapadas belonged to
(a) Eastern Uttar Pradesh
(b) Allahabad
(c) Bihar
(d) Ujjain
Answer:
(a) Eastern Uttar Pradesh

Question 3.
The horror of the Kalinga war was described in the Rock Edict …………….
(a) X
(b) XI
(c) XII
(d) XIII
Answer:
(d) XIII

Question 4.
The Source of information about the Mauryan Empire is from
(a) Puranas
(b) Edicts of Ashoka
(c) Bihar
(d) All of the above
Answer:
(d) All of the above

II. Match the statement with the Reason / Tick the appropriate answer

Question 1.
Statement (A) : Magadha’s gradual rise to political supremacy began with Bimbisara.
Reason (R) : Bimbisara extended the territory by conquests and matrimonial alliances.
(a) A is true but R is false
(b) A is false but R is true
(c) Both A and R are true
(d) Both A and R are false
Answer:
(c) Both A and R are true

Question 2.
Consider the following statements and find out which of the following statement(s) is/are correct.
(1) Board of 40 members divided into eight committees. Each had 5 members to manage the administration of the city.
(2) Town administration was under Nagarika.
(a) only 1
(b) only 2
(c) both 1 and 2
(d) neither 1 nor 2
Answer:
(b) only 2

III. Fill in the blanks

1. Chandragupta Maury a overthrew …………….
2. ……………. convened the first Buddhist council at Rajagriha.
3. The meaning of ……………. is explained in Ashoka’s – Pillar Edict II.
4. Council of ministers known as ……………. assisted the King.

Answer:

1. Dhana Nanda
2. Ajatasatru
3. Dhamma
4. Mantriparishad

IV. State True or False

1. Gold played a significant role in this transformation of society.
2. Magadha was located on the lower part of the Gangetic plain.
3. Mahapadma Nanda and his eight sons were known as Navanandas.
4. Ashoka held the third Buddist council at Kashmir.

Answer:

1. False
2. True
3. True
4. False

V. Match the following

Answer:
b) 4 3 2 1

VI. Answer in one or two sentences

Question 1.
What were the two kinds of government in North India during the sixth century BC?
Answer:

1. Gana – Sanghas (Non-monarchical states)
2. Kingdoms (Monarchies)

Question 2.
How were Mahajanapadas formed?
Answer:

1. Janapadas were the earliest gathering places of men.
2. Later, Janapadas became republics or smaller kingdoms. The widespread use of iron in the Gangetic plain created conditions for the formation of larger territorial^ units transforming the janapadas into Mahajanapadas.

Question 3.
What did Ashoka lay stress on?
Answer:

1. Compassion
2. Charity
3. Purity
4. Saintliness
5. Self – control
6. Truthfulness
7. Obedience and respect

VII. Answer the following

Question 1.
Give reasons for the decline of the Mauryan Empire.
Answer:

1. Ashoka’s successors were very weak.
2. Continuous revolts in different parts of the empire.
3. Invasion by the Bactrian Greeks weakened the empire.
4. Last Maurya ruler Brihadratha was killed by his commander Pushyamitra Sungha.
5. He established the Sungha dynasty.

Question 2.
What do you know about the Royal Art of Mauryan?
Answer:
Royal Art consists of palaces and public buildings, Monolithic pillars, Rock-cut Architecture and Stupas.

Stupas:

1. It is a semicircle dome constructed on brick or stone.
2. The Buddha’s relics were placed in the centre.
3. We can see the stupa at Sanchi near Bhopal.

Monolithic Pillar:

1. The crowning element in this pillar is ‘Dharma Chakra’.
2. We can see the pillar at Samath.

Rock cut Architecture:

1. Rock cut caves are in Barabar hills and Nagarjuna hills
2. They are to the north of Bodh Gaya.
3. 3 caves in Barabar hills have Ashoka’s inscriptions.
4. 3 caves in Nagarjuna hills have Dasharatha Maurya’s inscriptions, (grandson of Ashoka).

VII. Mind map

Students can Download Tamil Nadu 12th Computer Science Model Question Paper 3 English Medium Pdf, Tamil Nadu 12th Computer Science Model Question Papers helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

TN State Board 12th Computer Sceince Model Question Paper 3 English Medium

General Instructions:

1. The question paper comprises of four parts.
2. You are to attempt all the parts. An internal choice of questions is provided wherever applicable.
3. All questions of Part I, II, III and IV are to be attempted separately.
4. Question numbers 1 to 15 in Part I are Multiple Choice Questions of one mark each.
   These are to be answered by choosing the most suitable answer from the given four alternatives and writing the option code and the corresponding answer
5. Question numbers 16 to 24 in Part II are two-mark questions. These are to be answered in about one or two sentences.
6. Question numbers 25 to 33 in Part III are three-mark questions. These are to be answered in about three to five short sentences.
7. Question numbers 34 to 38 in Part IV are five-mark questions. These are to be answered in detail Draw diagrams wherever necessary.

Time: 3 Hours
Maximum Marks: 70

PART – 1

Choose the correct answer. Answer all the questions: [15 × 1 = 15]

Question 1.
Sin (0) = 0 is an example for function.
(a) Impure
(b) Pure
(c) Interface
(d) Instruction
Answer:
(b) Pure

Question 2.
Write the output (value stored in b)
1. a:=5
2. b:=a
(a) 0
(b) 3
(c) 5
(d) 2
Answer:
(c) 5

Question 3.
Which of the following shortcut is used to create new Python Program?
(a) Ctrl + C
(b) Ctrl + F
(c) Ctrl + B
(d) Ctrl + N
Answer:
(d) Ctrl + N

Question 4.
Escape sequences can be given using ……………………. parameter in print( ) function.
(a) Ret
(b) Let
(c) End
(d) Sep
Answer:
(c) End

Question 5.
Pick the correct one to execute the given statement successfully,
if_: print(x,” is a leap year”)
(a) x % 2 = 0
(b) x % 4 = = 0
(c) x/4 = 0
(d) x % 4 = 0
Answer:
(b) x % 4 = = 0

Question 6.
Find the wrong statement from the following.
(i) Slice a single character from a string
(ii) Slice a substring
(iii) Slice a substring without specifying beginning index
(iv) Slice a substring without specifying end index
(a) (i), (ii)
(b) (ii), (iii), (iv)
(c) All are wrong
(d) All are correct
Answer:
(d) All are correct

Question 7.
Write the output.
list = [34, 45, 48]
list.append(90)
(a) [34, 45, 48, 90]
(b) [90, 34, 45, 48]
(c) [34, 90, 45, 48]
(d) [34, 45, 90, 48]
Answer:
(a) [34, 45, 48, 90]

Question 8.
Match the following.
1. constructor – (I) def process(self)
2. Destructor – (II) S.x
3. method – (III) _del_(self)
4. object – (IV) _init_(self, num)
(a) 1-(IV) 2-(III) 3-(I) 4-(II)
(b) 1 -(I) 2-(II) 3-(III) 4-(IV)
(c) 1-(IV) 2-(II) 3-(I) 4-(III)
(d) 1 -(I) 2-(III) 3-(IV) 4-(II)
Answer:
(a) 1-(IV) 2-(III) 3-(I) 4-(II)

Question 9.
Match the following
1. Relational – (I) Classes
2. Object model – (II) Mainframe
3. ER model – (III) Key
4. Hierarchical – (IV) Entity
(a) 1-(III), 2-(I), 3-(IV), 4-(II)
(b) 1-(I), 2-(II), 3-(III), 4-(IV)
(c) 1-(IV), 2-(III), 3-(I), 4-(II)
(d) 1-(IV), 2-(II), 3-(I), 4-(III)
Answer:
(a) 1-(III), 2-(I), 3-(IV), 4-(II)

Question 10.
Identify which statement is given wrongly?
(a) DDL statement should specify the proper data type
(b) DDL should not identify the type of data division
(c) DDL may define the range of values
(d) DDL should define the size of the data item
Answer:
(b) DDL should not identify the type of data division

Question 11.
(I) csv.writer work with list/tuple
(II) csv.Dictwriter work with dictionary
(III) csv.DictReader work with list/tuple/dictionary.
(a) (I), (II) – True (III) – False
(b) (I) -True (II), (III) – False
(c) (I), (II), (III) – True
(d) (I), (II), (III) – False
Answer:
(a) (I), (II) – True (III) – False

Question 12.
Pick the odd one out.
(a) Perl
(b) Ruby
(c) Tel
(d) Java
Answer:
(d) Java

Question 13.
Match the following related to OS module.
1. g++ – (I) Name of C++ file
2. variable namel – (II) General compiler
3. mode – (III) Input output mode
4. variable_name2 – (IV) Name of exe file
(a) 1-(I), 2-(II), 3-(III), 4-(IV)
(b) 1-(II), 2-(I), 3-(III), 4-(IV)
(c) 1-(IV), 2-(III), 3-(II), 4-(I)
(d) 1-(IV), 2-(I), 3-(III) , 4-(II)
Answer:
(b) 1-(II), 2-(I), 3-(III), 4-(IV)

Question 14.
Assertion (A): Query result can be stored in csv file.
Reason (R): To display the query output in a tabular form.
(a) R is the reason for A
(b) R is wrong
(c) A is wrong
(d) Both are not related
Answer:
(a) R is the reason for A

Question 15.
Identify the Incorrect pair
1. Group – (i) Aggregate functions
2. Order by – (ii) Sortind data
3. Having – (iii) Filter data
4. Where – (iv) max, min
(a) (2)
(b) (1)
(c) (4)
(d) (3)
Answer:
(c) (4)

PART – II

Answer any six questions. Question No. 21 is compulsory. [6 × 2 = 12]

Question 16.
Write note on keyword argument?
Answer:
Keyword arguments will invoke the function after the parameters are recognized by their parameter names. The value of the keyword argument is matched with the parameter name and so, one can also put arguments in improper order (not in order).

Question 17.
What is composition in functions?
Answer:
The value returned by a function may be used as an argument for another function in a nested manner. This is called composition. For example, if we wish to take a numeric value or an expression as a input from the user, we take the input string from the user using the function input( ) and apply eval( ) function to evaluate its value.

Question 18.
Write note on len (str)?
Answer:
Syntax : len(str)
Description: Returns the length (no of characters) of the string.
Example: >>> A=”Corporation”
>>> print(len(A))
11

Question 19.
Define sequence data type?
Answer:
Python programming language has four collections of data types such as List, Tuples, Set – and Dictionary. A list in Python is known as a “sequence data type” like strings. It is an ordered collection of values enclosed within square brackets [ ].

Question 20.
Give example for modifying variable outside a function?
Answer:
Example:
let y: = 0
(int) inc (int) x
y: = y + x;
return (y)

Question 21.
Define ADT?
Answer:
Abstract Data type (ADT) is a type (or class) for objects whose behavior is defined by a set of value and a set of operations.

Question 22.
Write note on Boolean data type?
Answer:
A Boolean data can have any of the two values: True or False.
Example :
Bool_varl=True
Bool_var2=False

Question 23.
Write note on column, table constraint?
Answer:
Column constraint: Column constraint apply only to individual column.
Table constraint: Table constraint apply to a group of one or more columns.

Question 24.
What are the two ways of passing arguments in variable length method?
Answer:

1. Non keyword variable arguments
2. Keyword variable arguments

PART – III

Answer any six questions. Question No. 29 is compulsory. [6 × 3 = 18]

Question 25.
Explain print ( ) in python?
Answer:
In Python, the print( ) function is used to display result on the screen. The syntax for print( ) is as follows:
Example:
print (“string to be displayed as output ”) print (variable)
print (“String to be displayed as output ”, variable)
print (“Stringl ”, variable, “String 2”, variable, “String 3” )

Question 26.
Give the rules for variables?
Answer:
An Identifier is a name used to identify a variable, function, class, module or object.

1. An identifier must start with an alphabet (A..Z or a..z) or underscore (_).
2. Identifiers may contain digits (0 .. 9)
3. Python identifiers are case sensitive, i.e., uppercase and lowercase letters are distinct.
4. Identifiers must not be a python keyword.
5. Python does not allow punctuation character such as %,$, @ etc., within identifiers.

Question 27.
Explain commands and their functions in SQL?
Answer:
Tables are the only way to store data, therefore all the information has to be arranged in the form of tables. The SQL provides a predetermined set of commands to work on databases.

Keywords:
They have a special meaning in SQL. They are understood as instructions.

Commands:
They are instructions given by the user to the database also known as statements.

Clauses:
They begin with a keyword and consist of keyword and argument.

Arguments:
They are the values given to make the clause complete.

Question 28.
Write note on abs ( ), Ord ( ), Chr ( )?
Answer:

Question 29.
Write a pure function to find Gcd of 2 numbers?
Answer:
let rec gcd a b :=
if b < > 0 then gcd b (a mod b) else return a;;
output
gcd 13 27;;
-: int = 1
gcd 20536 7826;;
-: int = 2
In the above example program ‘gcd’ is the name of the function which recursively called till the variable ‘b’ becomes ‘O’. Remember b and (a mod b) are two arguments passed to ‘a’ and ‘b’of the gcd function.

Question 30.
Write the use of Savepoint command with an example?
Answer:
SAVEPOINT command:
The SAVEPOINT command is used to temporarily save a transaction so that you can rollback to the point whenever required. The different states of our table can be saved at anytime using different names and the rollback to that state can be done using the ROLLBACK command.

SAVEPOINT savepoint name;
UPDATE Student SET Name = ‘Mini’WHERE Admno=105;
SAVEPOINT A;

Question 31.
Find output:
str1 = input (“Enter a string: “)
index= -1
while index >= -(len(str1)):
print (“Subscriptf”,index,”] : ” + str1 [index])
index += -1
Answer:
Output:
Enter a string: welcome
Subscript [ -1 ] : e
Subscript [ -2 ] : m
Subscript [ -3 ] : o
Subscript [ -4] : c
Subscript [ -5 ] : 1
Subscript [ -6 ] : e
Subscript [ -7 ] : w

Question 32.
Name some functions where lambda 0 is used?
Answer:
filter ( ), map ( ), reduce

Question 33.
Find output:
Answer:
def
printinfo (name, sal=500):
print (name)
print (sal)
return
print info (“mani”)
Output:
Mani
500

PART – IV

Answer all the questions. [5 × 5 = 25]

Question 34 (a).
Explain, various data types in SQL?
Answer:

[OR]

(b) Compare DBMS with RDBMS?
Answer:

Question 35 (a).
Explain various characteristics of modules?
Answer:

1. Modules contain instructions, processing logic, and data.
2. Modules can be separately compiled and stored in a library.
3. Modules can be included in a program.
4. Module segments can be used by invoking a name and some parameters.
5. Module segments can be used by other modules.

[OR]

(b) Explain Alter command in SQL?
Answer:
The ALTER command is used to alter the table structure like adding a column, renaming the existing column, change the data type of any column or size of the column or delete the column from the table. It is used in the following way:

ALTER TABLE <table-name> ADD <column-name> <data type> <size>;
To add a new column “Address” of type ‘char’ to the Student table, the command is used as:-

ALTER TABLE Student ADD Address char;
To modify existing column of table, the ALTER TABLE command can be used with MODIFY clause like wise:

ALTER <table-name> MODIFY<column-name> <data type> <size>;
ALTER TABLE Student MODIFY Address char (25);

The above command will modify the address column of the Student table to now hold 25 characters. The ALTER command can be used to rename an existing column in the following way:

ALTER <table-name> RENAME old-column-name TO new-column-name;
For example to rename the column Address to City, the command is used as:

ALTER TABLE Student RENAME Address TO City;
The ALTER command can also be used to remove a column or all columns, for example to remove a particular column, the DROP COLUMN is used with the ALTER TABLE to remove a particular field, the command can be used as:

ALTER <table-name> DROP COLUMN <column-name>;
To remove the column City from the Student table, the command is used as:
ALTER TABLE Student DROP COLUMN City;

Question 36(a).
Consider the following employee table. Write SQL commands for the qtns.(i) to (v)?

1. To display the details of all employees in descending order of pay.
2. To display all employees whose allowance is between 5000 and 7000.
3. To remove the employees who are mechanic.
4. To add a new row.
5. To display the details of all employees who are operators.

Answer:
Output:

1. SELECT * FROM employee ORDER BY DESC;
2. SELECT * FROM employee WHERE ((allowance >= 5000) AND (allowance <=7000));
3. DELETE FROM employee WHERE desig = “Mechanic”;
4. INSERT INTO employee(Empcode, Name, desig, pay, allowance) VALUES(‘M1006’, ‘RAM’, ‘Mechanic’,22000, 8000);
5. SELECT * FROM employee WHERE desig = ‘operator’;

[OR]

(b) How will you write data into different types in CSV files?
Answer:
As you know Python provides an easy way to work with CSV file and has csv module to read and write data in the csv file. In the previous topics, You have learned how to read CSV files • in Python. In similar way, You can also write a new or edit an existing CSV files in Python.

1. Creating A New Normal CSV File
2. Modifying An Existing File
3. Writing On A CSV File with Quotes
4. Writing On A CSV File with Custom Delimiters
5. Writing On A CSV File with Lineterminator
6. Writing On A CSV File with Quotechars
7. Writing CSV File Into A Dictionary
8. Getting Data At Runtime And Writing In a File

Question 37 (a).
Write a sample program to illustrate private and public variables using classes?
Answer:
class Sample:
def_init_(self, n1, n2):
self._n1=n1
self._n2=n2
def display(self):
print(“Class variable 1 = “, self.n1)
print(“Class variable 2 = “, self._n2)
S=Sample(12, 14)
S.display( )
print(“Value 1 = “, S.n1)
print(“Value 2 = “, S._n2)
In the above program, there are two class variables n1 and n2 are declared. The variable nl is a public variable and n2 is a private variable. The display( ) member method is defined to show the values passed to these two variables.

The print statements defined within class will successfully display the values of n1 and n2, even though the class variable n2 is private. Because, in this case, n2 is called by a method defined inside the class. But, when we try to access the value of n2 from outside the class Python throws an error. Because, private variable cannot be accessed from outside the class.

Output:
Class variable 1 = 12 Class variable 2=14 Value 1 = 12
Traceback (most recent call last):
File “D:/Python/Class-Test-04.py”, line 12, in <module> print(“Value 2 = “, S._n2)
AttributeError: ‘Sample’ object has no attribute ‘n2’

[OR]

(b) Explain updating and deleting Tuple with example?
Answer:
As you know a tuple is immutable, the elements in a tuple cannot be changed. Instead of altering values in a tuple, joining two tuples or deleting the entire tuple is possible.
Example:
# Program to join two tuples
Tup 1 = (2, 4, 6, 8, 10)
Tup 2 = (1,3,5,7,9)
Tup 3 = Tup1 + Tup2
print(Tup3)

Output:
(2, 4, 6, 8, 10, 1, 3, 5, 7, 9)
To delete an entire tuple, the del command can be used.
Syntax: del tuple_name
Example:
Tup1 =(2, 4, 6, 8, 10)
print(“The elements of Tup1 is “, Tup1)
del Tup1
print (Tup1)

Output:
The elements of Tupl is (2, 4, 6, 8, 10)
Traceback (most recent call last):
File “D:/Python/Tuple Examp l.py”, line 4, in <module>
print (Tupl)
NameError: name ‘Tup1’ is not defined
Note that, the print statement in the above code prints the elements. Then, the del statement deletes the entire tuple. When you try to print the deleted tuple, Python shows the error.

Question 38 (a).
Explain nested If -elif – else statement with example?
Answer:
When we need to construct a chain of if statement(s) then ‘elif’ clause can be used instead of ‘else’.
Syntax:
if <condition-l>:
statements-block 1

elif <condition-2>:
statements-block 2

else:
statements-block n

In the syntax of if.elifi.else mentioned above, condition-1 is tested if it is true then statements- block 1 is executed, otherwise the control checks . condition-2, if it is true statements-block2 is executed and even if it fails statements-block n mentioned in else part is executed.

‘elif’ clause combines ifi.else-ifi.else statements to one if..elif…else, ‘elif’ can be considered to be abbreviation of ‘else if’. In an ‘if’ statement there is no limit of ‘elif’ clause that can be used, but an ‘else’ clause if used should be placed at the end.

Example:
Program to illustrate the use of nested if statement

m1=int (input(“Enter mark in first subject: ”))
m2=int (input(“Enter mark in second subject: ”))
avg= (m1+m2)/2
if avg>=80:
print (“Grade : A”)
elif avg>=70 and avg<80:
print (“Grade : B”)
elif avg>=60 and avg<70:
print (“Grade : C”)
elif avg>=50 and avg<60:
print (“Grade : D”)
else:
print (“Grade : E”)

Output 1:
Enter mark in first subject: 34 Enter mark in second subject: 78 Grade : D

Output 2 :
Enter mark in first subject: 67

[OR]

(b) Explain how to pass parameters in functions?
Answer:
Parameters or arguments can be passed to functions:-

deffunction_name (parameters) separated by comma):

Let us see the use of parameters while defining functions. The parameters that you place in the parenthesis will be used by the function itself. You can pass all sorts of data to the functions. Here is an example program that defines a function that helps to pass parameters into the function.

# assume w = 3 and h = 5
def area(w,h):
return w * h
print (area (3,5))

The above code assigns the width and height values to the parameters w and h. These parameters are used in the creation of the function “area”. When you call the above function, it returns the product of width and height as output. The value of 3 and 5 are passed to w and h respectively, the function will return 15 as output.

Students can download 6th Social Science Term 1 Civics Chapter 2 Achieving Equality Questions and Answers, Notes, Samacheer Kalvi 6th Social Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Social Science Civics Solutions Term 1 Chapter 2 Achieving Equality

Samacheer Kalvi 6th Social Science Achieving Equality Text Book Back Questions and Answers

I. Choose the correct answer

Question 1.
Which one of the following is not the reason for Prejudice?
(a) Socialization
(b) Economic Benefits
(c) Authoritarian personality
(d) Geography
Answer:
(d) Geography

Question 2.
Discrimination done on the basis of gender is referred to as
(a) gender discrimination
(b) caste discrimination
(c) religious discrimination
(d) inequality
Answer:
(a) gender discrimination

Question 3.
Gender-based stereotypes are often portrayed in …………….
(a) films
(b) advertisements
(c) TV serials
(d) All the these
Answer:
(d) All the these

Question 4.
Name the book/s written by A.P.J. Abdul Kalam
(a) India 2020
(b) Wings of Fire
(c) Ignited Minds
(d) All of these
Answer:
(d) All of these

Question 5.
A.P.J. Abdul Kalam was conferred Bharat Ratna in the year …………….
(a) 1997
(b) 1996
(c) 1995
(d) 1994
Answer:
(a) 1997

Question 6.
Viswanathan Anand became India’s first grandmaster in the year.
(a) 1985
(b) 1986
(c) 1987
(d) 1988
Answer:
(d) 1988

Question 7.
In which sport Ilavazhagi excels …………….
(a) Chess
(b) Wrestling
(c) Carrom
(d) Tennis
Answer:
(c) Carrom

Question 8.
Which article of the Constitution says discrimination against any citizen on grounds only of religion, race, caste, sex, place of birth or any of them is not permitted?
(a) 14(1)
(b) 15(1)
(c) 16(1)
(d) 17(1)
Answer:
(b) 15(1)

Question 9.
B.R. Ambedkar was conferred Bharat Ratna in the year …………….
(a) 1990
(b) 1989
(c) 1988
(d) 1987
Answer:
(a) 1990

Question 10.
As per the 2011 Census the highest literate district in Tamil Nadu
(a) Namakkal
(b) Salem
(c) Kanyakumari
(d) Sivagangai
Answer:
(c) Kanyakumari

II. Fill in the blanks

1. People have false belief and ideas on others is called …………….
2. A.P.J. Abdul Kalam was born in …………….
3. ……………. was the first recipient of Rajiv Gandhi Khel Ratna award, India’s highest Sport honour.
4. ……………. was the independent India’s first Law Minister.
5. As per the 2011 census the lowest Sex ratio was in …………….

Answer:

1. Prejudice
2. 1931
3. Viswanathan Anand
4. Dr.B.R.Ambedkar
5. Dharmapuri

III. Match the following

Answer:
1. – e
2. – d
3. – b
4. – c
5. – a

IV. Answer the following questions

Question 1.
What is Prejudice?
Answer:

1. Prejudice means to judge other people in a negative or inferior manner, without knowing much about them.
2. It happens when people have false beliefs and ideas.

Question 2.
What is a stereotype?
Answer:

1. A stereotype is a false view or idea about something.
2. For example, girls are not good at sports.
3. When prejudice gets stronger, it develops into a stereotype.

Question 3.
What is discrimination?
Answer:

1. Discrimination can be defined as negative actions towards people.
2. Discrimination can happen on the basis of colour, class, religion, and gender, etc.

Question 4.
What are the articles that are discussing equality in the Indian constitution?
Answer:

1. Article 14 of the constitution
2. Article 15(1) of the constitution

V. Answer the following in detail

Question 1.
What are the causes of prejudice?
Answer:

1. Socialization
2. Conforming behaviours
3. Economic benefits
4. Authoritarian personality
5. Ethno – centrism
6. Group closure
7. Conflicts

Question 2.
Write any two types of discrimination?
Answer:
(a) Gender discrimination:

1. Gender discrimination refers to health, education, economic and political inequalities between men and women in India.
2. For example a girl is not allowed to go to college after finishing her schooling.
3. Most of the girls are not allowed to select a career of their choice, rather they are forced into marriage.
4. In some families, girls are not allowed to wear modem dresses while boys in such families often wear modem dresses.

(b) Religious discrimination:

1. Religious discrimination is unequal treatment of an individual or group based on their beliefs.
2. Religious discrimination has been around for a long time.
3. There have been problems between people of different religions for thousands of years.
4. Some people are not allowed to enter in public places; especially the places of worship, because they belong to another religion.
5. Some religious people often end up in conflict with each other because of their rituals and way of life.

Question 3.
Explain the solution to the removal of inequality and discrimination in Indian society.
Answer:
The remedial measures for abolishing inequality and discrimination in Indian society are as follows.

1. Wider access to quality based services like healthcare and education for all.
2. Be aware of current gender bias.
3. Make women more visible in public life and institution to eradicate gender disparity.
4. Be open to learning about other religions.
5. Promoting community dining in the classroom may help the students to sit together without any bias of caste, religion, or gender.
6. Socialise with people of all types outside the home.
7. Effective implementation of laws.

VI. Projects and Activities

1. Split the class into small groups, discuss with your peer group on discrimination and write a report on it.
2. Collect information about any two famous personalities who faced prejudice and discrimination.

VII. HOTS

Question 1.
Various discrimination in India. Discuss.
Answer:

1. The different forms of inequalities such as caste inequality, religious inequality, race inequality, or gender inequality give rise to discrimination.
2. Discrimination can happen on the basis of colour, class, religion gender, etc.
3. Treating dark-skinned people differently from fair-skinned people, giving more importance to people of higher than to those of lower caste, and thinking boys are smarter than girls are all thoughts of discrimination.
4. Article 15(1) of the constitution states that the State not to discriminate against any citizen on grounds only of religion, race, caste, sex, place of birth, or any of them.

VIII. Life Skill

1. How can you fight against prejudice and discrimination in your village?

Samacheer Kalvi 6th Social Science Achieving Equality Additional Important Questions and Answers

I. Choose the correct answer

Question 1.
Apartheid was practiced in ……………
(a) Germany
(b) Australia
(c) South Africa
(d) India
Answer:
(c) South Africa

Question 2.
Viswanathan Anand was born in _______
(a) Chennai
(b) Bengaluru
(c) Thiruvananthapuram
(b) Vishakapatnam
Answer:
(a) Chennai

Question 3.
The chairman of the Drafting Committee of India’s constituent Assembly was ……………
(a) Nehru
(b) Dr. Ambedkar
(c) Mount Batten
(d) Dr. Abdul kalam
Answer:
(b) Dr. Ambedkar

Question 4.
Apartheid, the racist policy was brought to an end by _______
(a) Martin Luther
(b) Nelson Mandela
(c) Mother Theresa
(d) Tagore
Answer:
(b) Nelson Mandela

Question 5.
Mr. Viswanathan Anand won the World Junior Championship in ……………
(a) Chess
(b) Carrom
(c) Cricket
(d) High jump
Answer:
(a) Chess

II. Answer the following questions

Question 1.
Mention the types of prejudice
Answer:

1. Gender prejudice
2. Racial prejudice
3. Class prejudice
4. Disability prejudice

Question 2.
Name the books written by Dr. APJ Abdul Kaiam.
Answer:
Dr. APJ Abdul Kalam wrote many books. The famous among them are –

1. India 2020
2. Wings of Fire
3. Ignited Minds
4. The Luminous Sparks
5. Mission India.

Question 3.
What is meant by constitution?
Answer:
A constitution is a set of rules and regulations guiding the administration of a country.

Question 4.
What does Article 15(1) of our constitution state about discrimination?
Answer:
The state shall not discriminate against any citizen on grounds only of religion, race, caste, sex and place of birth or any of them.

Question 5.
What does Article 14 of our constitution state about equality?
Answer:
Article 14 provides equality before law or equal protection within the territory of India and prohibits unreasonable discrimination between persons.

III. Mind map

Tamilnadu State Board New Syllabus Samacheer Kalvi 6th Social Science Guide Pdf History Term 1 Chapter 1 What is History?Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 6th Social Science Solutions History Term 1 Chapter 1 What is History?

6th Social Science Guide What is History? Text Book Back Questions and Answers

I. Choose the correct answer

Question 1.
What was the step taken by the early man to collect his food?
(a) trade
(b) hunting
(c) painting
(d) rearing of animals
Answer:
(b) hunting

II. Match the statement with the reason. Tick the appropriate answer

Question 1.
Statement: Pre historic man went along with the dog for hunting.
Reason: Dogs with its sniffing power would find out other animals.
(a) Statement is true, but reason is wrong.
(b) Statement and reason are correct.
(c) Statement is wrong, but reason is correct.
(d) Both statement and reason are wrong.
Answer:
(b) Statement and reason are correct

Question 2.
Statement: The objects used by the early man are excavated. They are preserved to know the lifestyle of the people.
Find out which of the following is related to the statement.
(a) Museum
(b) Burial materials
(e) Stone tools
(d) Bones
Answer:
(a) Museum

Question 3.
Find out the wrong pair:
(a) Old stone age – Stone tools
(b) Rock paintings – Walls of the caves
(c) Copper plates – A source of history
(d) Cats – First domesticated
Answer:
(d) Cats – First domesticated

Question 4.
Find the odd one:
(a) Paintings were drawn on rocks and caves.
(b) There were paintings depicting hunting scenes.
(c) It was drawn to show his family members about hunting.
(d) The paintings were painted by using many colours.
Answer:
(c) It was drawn to show his family members about hunting.

III. Fill in the blanks

1. The Old Stone age man lived mostly in ………………
2. ……………… is the Father of history.
3. ………………was the first animal tamed by Old Stone Age man.
4. Inscriptions are ……………… sources
5. Ashoka Chakra has ……………… spokes.

Answer:

1. Caves
2. Herodotus
3. Dog
4. archaeological
5. 24

IV. State True or False

1. Stone tools belonging to the Old Stone age have been excavated at Athtirampakkam near Chennai.
2. The materials used by the ancient people are preserved in the museums by the Archaeological Department.
3. During the period of Ashoka, Buddhism spread across the country.

Answer:

1. True
2. True
3. True

V. Match the following

1. – d
2. – a
3. – b
4. – c

VI. Answer in one word

Question 1.
Can you say any two advantages of writing a diary?
Answer:

1. Diary writing helps to record the events.
2. It reveals the lifestyle of people of that period.

Question 2.
How do we know the people’s lifestyle of the Old Stone Age?
Answer:
We understand the lifestyle of people of the Old Stone Age from used stone tools, their paintings on the rocks and walls of the caves.

Question 3.
Is inscription a written record?
Answer:
Yes. The inscription is a written record.

Question 4.
What is proto history?
Answer:
Protohistory is the period between prehistory and history.

Question 5.
Name an epic.
Answer:
Silapadhikaram.

VII. Answer the following

Question 1.
What is history?
Answer:

1. History is a record of past events in chronological order.
2. The term History has been derived from the Greek word Istoria which means learning by enquiry.

Question 2.
What do you know about the prehistoric period?
Answer:

1. The period between the use of the first stone tools and the invention of writing systems is pre-history.
2. Stone tools excavated materials, and rock paintings are the major sources of pre-history

Question 3.
What are the sources available to know about the prehistoric period?
Answer:
Paintings on the rocks and the walls of the caves, stone tools, excavated materials are the sources available to know about the pre-historic period.

Question 4.
Mention the places from where we got pre-historic tools.
Answer:
We find the pre-historic tools at Kondapur, Nevasa, Mehrgash, Rock shelters of Bhimbetka, and Edakkal caves in India. In Tamilnadu Attirampakkam, Ariyalur, Perambulur, Adichanalur are the places where we came across the pre-historic tools.

Question 5.
What are the benefits of a museum?
Answer:

1. Museums are community centres designed to inform and teach the public.
2. The educational benefit of a museum is academic learning.
3. Museums are the caretakers of history as much as they offer connections to history.
4. Museums are full of stories, and it is interesting for students to hear these stories.
5. Museums offer opportunities for children to compare and contrast leading to critical thinking skills.
6. Children’s curiosity comes out in the form of questions.
7. Students are exposed to new ideas and concepts.
8. Museums inspire students to wonder, imagine, and dream Of possibilities that are beyond what they know.
9. Students are exposed to opportunities that spark creative moments.

Question 6.
Name some tools used by early man to hunt animals.
Answer:

1. Blade cores were used. These were chunks of Sharp rocks.
2. An end scraper is a tear-drop shaped piece of stone used to scrap fur and fatty tissue from the hides of animals.
3. Burins were stone tools with a rounded grasping end and at the sharp, razor-like working end.
4. Awls were small circular stone flakes.

Question 7.
Why were paintings drawn on rocks?
Answer:

1. Paintings could have been drawn or rocks to convey their lifestyles to future generations.
2. They might have wished to record their activities through their paintings.

Question 8.
Name any two artifacts.
Answer:
Potteries, Toys, Tools, and Ornaments.

1. An artefact is something made or given shape by men, such as a tool or a work of art, especially an object of archaeological interest.
2. Some of the artefacts are potteries, toys, tools, and ornaments.

VIII. HOTS

Question 1.
How dogs were useful to prehistoric man?
Answer:

1. Dogs with their sniffing power helped them find out other wild animals.
2. Dog helped them prevent the entry of dangerous animals.
3. Thus dogs helped them in hunting and protection.

Question 2.
Compare the lifestyle of Old. Stone Age man with present-day lifestyle.
Answer:
Old Stone age man

1. He was a nomad.
2. Took shelter on branches of trees, in holes and caves.
3. Wore dresses made out of leaves, the skin of animals, and barks of trees.
4. Ate vegetables, fruits, and roots which he gathered from jungles.
5. Not civilized.

Present-day man:

1. Settled in villages and towns.
2. Lives in well-built houses.
3. Wears dresses made out of cotton and other materials.
4. Eats all kinds of food grains.
5. Well civilized.

IX. Activity (For Students)

1. Write down the important events of your family with years. Draw a timeline with the help of your teacher of with your classmates.
2. Early man used stones as a weapon. Make an album showing the various uses of stone.
3. Identify the category of the following sources of history.
   • Urns excavated from Adhichanallur.
   • Copper plates of Velvikudi.
   • Mahabharatha.
   • Sanchi Stupa
   • Pattinappaalai.
   • The earthernwares form keezhadi
   • Toys of Indus Civilisation.
   • Big Temple of Thanjavur.

X. Life Skill (For Students)

1. Make some weapon models used by the old stone Age man using clay.
2. Discuss with your grandpa, grandma, neighbours, and teachers and collect information about your street, villages, town or school. With the collected data, try to write its history titling your writing as “I am a Historian”.

XI. Answer Grid

Question 1.
Early men scribbled and painted on me Today they used me to build houses and lay roads. Who am I?
Answer:
Rock.

Question 2.
Name any two archaeological sources?
Answer:

1. Coins
2. Inscriptions

Question 3.
Name the types of literary sources?
Answer:

1. Secular literature
2. Religious literature

Question 4.
Expand BC (BCE).
Answer:
Before the common era

Question 5.
What is the meaning of the Greek word “Istoria”?
Answer:
Learning by enquiry

Question 6.
Expand AD (CE).
Answer:
Common era

Question 7.
…………….. is the study of inscriptions..
Answer:
Epigraphy

Question 8.
…………….. is the study of coins.
Answer:
Numismatics

Question 9.
I can help you to talk, see, hear, write, and read. There is no world without me. Who am I?
Answer:
Mobile Phone

6th Social Science Guide What is History? Additional Important Questions and Answers

I. Choose the correct answer

Question 1.
Dhamma is a word.
(a) Prakrit
(b) Sanskrit
(c) Latin
(d) Greek
Answer:
(a) Prakrit

II. Match the statement with the reason

Question 1.
Statement: Ashoka was the first ruler to give up war after victory.
Reason: He was upset and grief-stricken at the sight of the war.
(a) Statement is true but the reason is wrong.
(b) Both statement and reason are correct.
(c) Both statement and reason are wrong.
(d) Statement is wrong but the reason is correct.
Answer:
(b) Both statement and reason are correct

Question 2.
(a) Statement: Archaeological sources help to know about the early man.
Find out which of the following is related to the statement.
(a) Monuments
(b) Pictures
(c) Metals
(d) Books
Answer:
(a) Monuments

Question 3.
Find out the wrong pair.
(a) Numismatics – The study of coins
(b) Epigraphy – The study of Inscription
(c) Epic – Pattinapaalai
(d) Copper plates – Velvikudi
Answer:
(c) Epic – Pattinapaalai

Question 4.
Find the odd one.
(a) The dharma chakra has 24 spokes.
(b) It is seen in our National Flag.
(c) It was taken from Sanchi Stupa.
(d) It belongs to the Mauryan period
Answer:
(c) It was taken from Sanchi Stupa

III. Fill in the blanks

1. The Big Temple is in ……………
2. The most famous ruler of ancient India was ……………
3. Istoria means ……………

Answer:

1. Thanjavur.
2. Ashoka.
3. Learning by enquiry.

IV. State True or False

1. The term History has been derived from the Latin word ‘Istoria’.
2. We understand the lifestyle of old stone age people from used stone tools.
3. Thirumalai Nayakkar Mahal is in Thanjavur.

Answer:

1. False
2. True
3. False

V. Match the following

Answer:
1. – b
2. – a
3. – d
4. – c

VI. Mind Map

Students can download 6th Social Science History Term 1 Chapter 2 Human Evolution Questions and Answers, Notes, Samacheer Kalvi 6th Social Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Social Science History Solutions Term 1 Chapter 2 Human Evolution

Samacheer Kalvi 6th Social Science Human Evolution Text Book Back Questions and Answers

I. Choose the correct answer

Question 1.
The process of evolution is …………….
(a) direct
(b) indirect
(c) gradual
(d) fast
Answer:
(c) gradual

Question 2.
Tanzania is situated in the continent of ________.
(a) Asia
(b) Africa
(c) America
(d) Europe
Answer:
(b) Africa

II. Match the statement with the reason. Tick the appropriate answer:

Question 1.
Statement : Migration of man of different parts of the world resulted in changes of physic and colour
Reason : Climatic changes.
(a) Statement is correct.
(b) Reason is wrong.
(c) Statement and Reason are correct.
(d) Statement and Reason are wrong.
Answer:
(c) Statement and Reason are correct

III. Find out the right pair

(a) Australopithecus – Walked on both legs
(b) Homo habilis – Upright man
(c) Homo erectus – Wise man
(d) Homo sapiens – Less protruding face
Answer:
(c) Homo erectus – Wise man

IV. Fill in the blanks

1. ………………. unearthed the footprints of humans in Tanzania.
2. Millions of years ago, our ancestors led a ………………. life.
3. The main occupations of the ancient humans were ………………. and ……………….
4. The invention of ………………. made farming easier.
5. Rock paintings are found at ………………. in Nilgiris.

Answer:

1. Anthropologist.
2. Nomadic.
3. hunting, gathering.
4. Plough.
5. Porivarai cave.

V. State True or False

1. Anthropology is the study of coins.
2. Homo erectus (Java man) had the knowledge of fire.
3. The first scientific invention of humans was wheel.
4. Goat was the first animal to be domesticated by humans.

Answer:

1. False
2. True
3. True
4. False

VI. Answer in one word

Question 1.
What method is used to find out the age of the excavated materials?
Answer:
Radio Carbon dating method.

Question 2.
What did early humans wear?
Answer:
Hides of animals and barks of trees and leaves.

Question 3.
Where did early humans live?
Answer:
In caves.

Question 4.
Which animal was used for ploughing?
Answer:
Oxen

Question 5.
When did humans settle in one place?
Answer:
When people began to practice agriculture, life became an organised one. It made the people settle in one place.

VII. Answer the following

Question 1.
What is evolution?
Answer:
Evolution is the process through which humankind changes and develops towards an advanced stage of life.

Question 2.
Write any two characteristics of Homo sapiens,
Answer:

1. Homo sapiens were wise men.
2. They migrated out of Eastern Africa settled in different parts of the world.
3. Their lifestyle also evolved and they made it suitable to the environs in which they lived.

Question 3.
Why did humans move from place to place?
Answer:
Humans kept on moving in search of food.

Question 4.
Describe the ancient methods of hunting,
Answer:

1. Collective hunting: Went as a group and hunted the prey
2. They dung a pit and trapped the animals and hunted.

Question 5.
Why were axes made?
Answer:
The axes were made to cut trees, remove barks, dig pits, hunt animals and remove the skin of animals.

Question 6.
How would you define archaeology?
Answer:

1. Archaeology is the study of pre-historic humans.
2. Excavated material remains are the main source for archaeological studies.

Question 7.
What do you know about anthropology?
Answer:
Anthropology is the study of humans and evolutionary history.

VIII. HOTS

Question 1.
Importance of invention of the wheel from the ancient period to the modern period
Answer:

1. Early homosapiens realised that round objects could be easily moved by rolling them.
2. Their descendants advanced this rolling technique into the transportation of large objects on cylindrical logs.
3. The invention of the wheel and axle allowed a rolling log to be placed through a hole in the wheel to create a cart.
4. Chariot racing was influential in the evolution of the spoked wheel as it allowed chariots to move much faster.
5. The invention of air-filled rubber tyres allowed wheels to be much faster, sturdier, and stronger.

IX. Activity ( For Student)

Prepare an album collecting the pictures of ancient humans of different ages.

X. Answer Grid

Question 1.
The invention of …………….. made pot making it easier.
Answer:
Wheel

Question 2.
Barter system means ……………..
Answer:
Exchanging one thing for another.

Question 3.
Name any two weapons used by early humans for hunting.
Answer:
Stones, bones, and horns of animals.

Question 4.
Which is the best stone for making weapons?
Answer:
chikki – mukki – kal

Question 5.
Towns and cities emerged because ……………. of …………….. and.
Answer:
trade, commerce

Question 6.
Which was the first scientific invention of humans?
Answer:
Wheel.

Question 7.
Identify the pictures in rock paintings.
Answer:
Hunting and dancing pictures

Question 8.
Which was the main occupation of early humans? What do cave paintings tell us?
Answer:
Information about the past.

Question 9.
Where did the early humans live?
Answer:
In caves.

Question 10.
…………….. is related to the field of archaeology.
Answer:
Anthropology

Question 11.
Name any two animals domesticated by an early humans.
Answer:
Dogs and Oxen

XI. Life Skill (For Students)

1. Make pots and tools by using clay.
2. Collect different types of moving dolls and tell them to change the wheels with different shapes like square, triangle, etc., and find out how it moves.

Samacheer Kalvi 6th Social Science Human Evolution Additional Important Questions and Answers

I. Choose the correct answer

Question 1.
The word ‘anthropology’ is derived from two …………….. words.
(a) Greek
(b) Latin
(c) Sanskrit
(d) Prakrit
Answer:
(a) Greek

Question 2.
Harpoons and spear throwers were used by _______
(a) Homo erectus
(b) Homo sapiens
(c) Cromagnons
(d) Homo habilis

II. Match the statement with the reason

Question 1.
Statement: Early humans decided to use guns for hunting.
Reason: It was difficult for them to kill big animals with a stick or stone.
a. Both statement and reason are correct
b. Both statement and reason are the wrong
c. The statement is wrong and the reason is correct.
d. Statement is correct and the reason is wrong.
Answer:
(c) Statement is wrong and the reason is correct.

III. Find out the wrong pair

(a) Homo sapiens – Africa
(b) Homo habits – South Africa
(c) Homo erectus – Asia
(d) Cro – magnons – China
Answer:
(d) Cro – magnons – China

IV. State True or False

1. The Neanderthal people buried the dead.
2. During the prehistoric period, horses were used to draw carts. Homo sapiens were wise.
3. Flintstones were easily available.
4. Coins made of iron were used by prehistoric people.

Answer:

1. True
2. False
3. True
4. False
5. False

V. Answer in brief

Question 1.
Write a short note on the mode of transport in 1850.
Answer:

1. There were no buses or cycles.
2. A cart pulled by mules and bullocks were seen on the roads.
3. A horse-drawn cart was a rare occurrence.

Question 2.
What is meant by the barter system?
Answer:
The early men exchanged the surplus grains with other groups for the other things they were in need of. This is called the barter system.

V. Answer in brief

Question 1.
Write a short note on the mode of transport in 1850.
Answer:

1. There were no buses or cycles.
2. A cart pulled by mules and bullocks were seen on the roads.
3. A horse-drawn cart was a rare occurrence.

Question 2.
What is meant by the barter system?
Answer:
The early men exchanged the surplus grains with other groups for the other things they were in need of. This is called the barter system.

VI. Mind map

 

Students can Download Tamil Nadu 12th Maths Model Question Paper 5 English Medium Pdf, Tamil Nadu 12th Maths Model Question Papers helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

TN State Board 12th Maths Model Question Paper 5 English Medium

Instructions:

1.  The question paper comprises of four parts.
2.  You are to attempt all the parts. An internal choice of questions is provided wherever applicable.
3. questions of Part I, II. III and IV are to be attempted separately
4. Question numbers 1 to 20 in Part I are objective type questions of one -mark each. These are to be answered by choosing the most suitable answer from the given four alternatives and writing the option code and the corresponding answer
5. Question numbers 21 to 30 in Part II are two-marks questions. These are to be answered in about one or two sentences.
6. Question numbers 31 to 40 in Parr III are three-marks questions, These are to be answered in about three to five short sentences.
7. Question numbers 41 to 47 in Part IV are five-marks questions. These are to be answered) in detail. Draw diagrams wherever necessary.

Time: 3 Hours
Maximum Marks: 90

Part – I

I. Choose the correct answer. Answer all the questions. [20 × 1 = 20]

Question 1.
If | adj(adj A) | = |A|⁹, then the order of the square matrix A is _______.
(a) 3
(b) 4
(c) 2
(d) 5
Answer:
(b) 4

Question 2.
If |z₁| = 1, |z₂| = 2, |z₃| = 3 and |9z₁z₂ + 4z₁z₂ + z₂z₃| = 12, then the value of |z₁ + z₂+ z₃| is ________.
(a) 1
(b) 2
(c) 3
(d) 4
Answer:
(b) 2

Question 3.
The value of \(\left(\frac{1+\sqrt{3} i}{1-\sqrt{3} i}\right)^{10}\) is ________.

Answer:
(a) cis \(\frac{2 \pi}{3}\)

Question 4.
If \(\cot ^{-1}(\sqrt{\sin \alpha})+\tan ^{-1}(\sqrt{\sin \alpha})=u\), then cos 2u is equal to _____.
(a) tan² α
(b) 0
(c) -1
(d) tan 2α
Answer:
(c) -1

Question 5.
If \(\cot ^{-1} x=\frac{2 \pi}{5}\) for some x∈R, the value of tan^-1 x is _______.

Answer:
(c) \(\frac{\pi}{10}\)

Question 6.
The radius of the circle passing through the point (6, 2) two of whose diameter are x + y = 6 and x + 2y = 4 is ____.
(a) 10
(b) \(2 \sqrt{5}\)
(c) 6
(d) 4
Answer:
(b) \(2 \sqrt{5}\)

Question 7.
The length of the L.R. of x² = -4y is _______.
(a) 1
(b) 2
(c) 3
(d) 4
Answer:
(d) 4

Question 8.
Distance from the origin to the plane 3x – 6y + 2z + 7 = 0 is ______.
(a) 0
(b) 1
(c) 2
(d) 3
Answer:
(b) 1

Question 9.
The distance from the origin to the plane \(\vec{r} \cdot(2 \vec{i}-\vec{j}+5 \vec{k})=7\) is _____.

Answer:
(a) \(\frac{7}{\sqrt{30}}\)

Question 10.
The number given by the Mean value theorem for the function \(\frac{1}{x}\), x ∈ [1, 9] is ______.
(a) 2
(b) 2.5
(c) 3
(d) 3.5
Answer:
(c) 3

Question 11.
f is a differentiable function defined on an interval I with positive derivative. Then f is ______.
(a) increasing on I
(b) decreasing on I
(c) strictly increasing on I
(d) strictly decreasing on I
Answer:
(c) strictly increasing on I

Question 12.
If we measure the side of a cube to be 4 cm with an error of 0.1 cm, then the error in our calculation of the volume is ________.
(a) 0.4 cu.cm
(b) 0.45 cu.cm
(c) 2 cu.cm
(d) 4.8 cu.cm
Answer:
(d) 4.8 cu.cm

Question 13.
If u(x, y) = \(e^{x^{2}+y^{2}}\), then \(\frac{\partial u}{\partial x}\) is equal to _______.
(a) \(e^{x^{2}+y^{2}}\)
(b) 2xu
(c) x²u
(d) y²u
Answer:
(b) 2xu

Question 14.
The value of \(\int_{0}^{\infty} e^{-3 x} x^{2} d x\) is _______.
(a) \(\frac{7}{27}\)
(b) \(\frac{5}{27}\)
(c) \(\frac{4}{27}\)
(d) \(\frac{2}{27}\)
Answer:
(d) \(\frac{2}{27}\)

Question 15.
\(\int_{0}^{a} f(x) d x\) is _____.

Answer:
(b) \(\int_{0}^{a} f(a-x) d x\)

Question 16.
The integrating factor of the differential equation \(\frac{d y}{d x}\) + P(x) y = Q (x) is x, then P(x) ______.
(a) x
(b) \(\frac{x^{2}}{2}\)
(c) \(\frac{1}{x}\)
(d) \(\frac{1}{x^{2}}\frac{1}{x^{2}}\)
Answer:
(c) \(\frac{1}{x}\)

Question 17.
The order and degree of the differential equation p\(\frac{d^{2} y}{d x^{2}}+\left(\frac{d y}{d x}\right)^{1 / 3}+x^{1 / 4}=0\) are respectively _______.
(a) 2, 3
(b) 3, 3
(c) 2, 6
(d) 2, 4
Answer:
(a) 2, 3

Question 18 .
Which of the following is a discrete random variable?
I. The number of cars crossing a particular signal in a day.
II. The number of customers in a queue to buy train tickets at a moment.
III. The time taken to complete a telephone call.
(a) I and II
(b) II only
(c) III only
(d) II and III
Answer:
(a) I and II

Question 19.
If p is true and q is false then which of the following is not true?
(a) p → q is false
(b)p ∨ q is true
(c)p ∧ q is false
(d) p ↔ q is true
Answer:
(d) p ↔ q is true

Question 20.
The operation * defined by a*b = \(\frac{a b}{7}\) is not a binary operation on ______.
(a) Q⁺
(b) Z
(c) R
(c) C
Answer:
(b) Z

Part – II

II. Answer any seven questions. Question No. 30 is compulsory. [7 × 2 = 14]

Question 21.
Using elementary transformations find the inverse of the following matrix \(\left[\begin{array}{ll}
4 & 7 \\
3 & 0
\end{array}\right]\)
Answer:

Question 22.
If Z₁ = 1 – 3i, z₂ = -4i, and z₃ = 5, show that (z₁ + z₂) + z₃ = Z₁ + (z₂ + z₃)
Answer:
z₁ = 1 – 3i, z₂ = 4i, z₃ = 5
(z₁ + z₂) + z₃ = (1 – 3i – 4i) + 5(1 – 7i) + 5
= 6 – 7i …..(1)
z₁ + (z₂ + z₃) = (1 – 3i) + (-4i + 5)
= 6 – 7i …..(2)
from(1)& (2)we get
∴ (z₁ + z₂) + z₃ = z₁ + (z₂ + z₃)

Question 23.
Find a polynomial equation of minimum degree with rational coefficients, having 2+ \(\sqrt{3}\) i as
a root.
Answer:
Given roots is (2 + \(\sqrt{3}\) i)
∴ The other root is (2 – \(\sqrt{3}\) i), since the imaginary roots with real co-efficient occur as conjugate
pairs.
x² – x(S.O.R) + P.O.R = 0 ⇒ x² – x(4) + (4 + 3) = 0
x² – 4x + 7 = 0.

Question 24.
Evaluate: \(\lim _{x \rightarrow \infty}\left(\frac{x^{2}+17 x+29}{x^{4}}\right)\)
Answer:
This is an indeterminate of the form (\(\frac{\infty}{\infty}\)). To evaluate this limit, we apply l’Hôpital Rule.

Question 25.
Let g(x, y) = 2y + x², x = 2r – s, y = r² + 2s, r, s ∈R. Find \(\frac{\partial g}{\partial r}, \frac{\partial g}{\partial s}\).
Answer:

Question 26.
Evaluate: \(\int_{0}^{\frac{\pi}{2}}\left(\sin ^{2} x+\cos ^{4} x\right) d x\)
Answer:

Question 27.
Find the differential equation corresponding to the family of curves represented by the equation y = Ae^8x + Be^-8x, where A and B are arbitrary constants.
Answer:
y = Ae^8x + Be^-8x Where A and B are arbitrary constants.
Differentiate with respect to ‘x’

Question 28.
If F(x) = \(\frac{1}{\pi}\left(\frac{\pi}{2}+\tan ^{-1} x\right)\) – ∞ < x < ∞ is a distribution function of a continuous variable X, find P (0 ≤ x ≤ 1).
Answer:

Question 29.
Show that p → q and q → p are not equivalent.
Answer:
Truth table for p → q

Truth table for q → p

The entries in the column corresponding to p → q and q → p are not identical, hence they are not equivalent.

Question 30.
Show that the lines \(\frac{x-1}{4}=\frac{2-y}{6}=\frac{z-4}{12}\) and \(\frac{x-3}{-2}=\frac{y-3}{3}=\frac{5-z}{6}\) are parallel.
Answer:
We observe that the straight line \(\frac{x-1}{4}=\frac{2-y}{6}=\frac{z-4}{12}\) is parallel to the vector \(4 \hat{i}-6 \hat{j}+12 \hat{k}\) and the straight line \(\frac{x-3}{-2}=\frac{y-3}{3}=\frac{5-z}{6}\) is parallel to the vector \(-2 \hat{i}+3 \hat{j}-6 \hat{k}\).
Since \(4 \hat{i}-6 \hat{j}+12 \hat{k}=-2(-2 \hat{i}+3 \hat{j}-6 \hat{k})\) the two vectors are parallel, and hence the two straight lines are parallel.

Part – III

II. Answer any seven questions. Question No. 40 is compulsory. [7 × 3 = 21]

Question 31.
Using elementary transformations find the inverse of the matrix \(\left[\begin{array}{ccc}
1 & -1 & 1 \\
2 & 1 & -3 \\
1 & 1 & 1
\end{array}\right]\)

Question 32.
Find the square roots of – 15 – 8i

Question 33.
Find the sum of the squares of the roots of ax⁴ + bx³ + cx² + dx + e = 0, a ≠ 0

Question 34.
For what value of x, the inequality \(\frac{\pi}{2}\) < cos^-1 (3x – 1) < π holds?

Question 35.
Find the foot of the perpendicular drawn from the point (5, 4, 2) to the line \(\frac{x+1}{2}=\frac{y-3}{3}=\frac{z-1}{-1}\). Also, find the equation of the perpendicular.

Question 36.
Evaluate \(\int_{0}^{\infty} \frac{x^{n}}{n^{x}} d x\), where n is a positive integer ≥ 2.

Question 37.
The engine of a motor boat moving at 10 m/s is shut off. Given that the retardation at any subsequent time (after shutting off the engine) equal to die velocity at that time. Find the velocity after 2 seconds of switching off the engine.

Question 38.
The probability that Mr.Q hits a target at any trial is \(\frac{1}{4}\). Suppose he tries at the target 10 times. Find the probability that he hits the target (i) exactly 4 times (ii) at least one time.

Question 39.
Consider the binary operation * defined on the set A = {a, b, c, d} by the following table:

Is it commutative and associative?

Question 40.
Evaluate the following limit, if necessary use l’Hopital Rule. \(\lim _{x \rightarrow \infty}\left(1+\frac{1}{x}\right)^{x}\)

Part – IV

IV. Answer all the questions. [7 × 5 = 35]

Question 41.
(a) Find the inverse of A = \(\left[\begin{array}{lll}
2 & 1 & 1 \\
3 & 2 & 1 \\
2 & 1 & 2
\end{array}\right]\) by Gauss-Jordan method
[OR]
(b) Find the point of intersection of the lines \(\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}\) and \(\frac{x-4}{5}=\frac{y-1}{2}=z\).

Question 42.
(a) Suppose z₁, z₂ and z₃ are the vertices of an equilateral triangle inscribed in the circle.
|z| = 2. If z₁ = 1 + i\(\sqrt{3}\), then find z₂ and z₃.
[OR]
(b) If A = \(\left[\begin{array}{cc}
5 & 3 \\
-1 & -2
\end{array}\right]\) show that A² – 3A – 7I₂ = O₂. Hence Find A^-1.

Question 43.
(a) Solve the equation 3x³ – 16x² + 23x – 6 = 0 if the product of two roots is 1.
[OR]
(b) The mean and variance of a binomial variate X are respectively 2 and 1.5.
Find (i) P(X = 0) (ii) P(X = 1) (iii) P(X ≥ 1)

Question 44.
(a) Find the value of \(\cos \left(\sin ^{-1}\left(\frac{4}{5}\right)-\tan ^{-1}\left(\frac{3}{4}\right)\right)\)
[OR]
(b) Find, by integration, the volume of the solid generated by revolving about y-axis the region bounded between the curve y = \(\frac{3}{4} \sqrt{x^{2}-16}\), x ≥ 4, the y-axis, and the lines y = 1 and y = 6.

Question 45.
(a) A semielliptical archway over a one-way road has a height of 3m and a width of 12m. The truck has a width of 3m and a height of 2.7m. Will the truck clear the opening of the archway?
[OR]
(b) For the function f(x, y) = \(\frac{3 x}{y+\sin x}\) find the f_x, f_y, and show that f_xy = f_yx.

Question 46.
(a) Derive the equation of the plane in the intercept form.
[OR]
(b) Let A be Q\{1}. Define * on A by x * y = x +y – xy. Is * binary on A ? If so, examine the existence of identity, existence of inverse properties for the operation * on A .

Question 47.
(a) Find the angle between the rectangular hyperbola xy = 2 and the parabola x² + 4y = 0.
[OR]
(b) A pot of boiling water at 100° C is removed from a stove at time t = 0 and left to cool in the kitchen. After 5 minutes, the water temperature has decreased to 80° C, and another 5 minutes later it has dropped to 65° C. Determine the temperature of the kitchen.