Class 11 Question Paper 2024 Computer Science (with Answers)

ANNUAL EXAMINATION

Question Paper
2024

NCERT BASED SYLLABUS
FOR CBSE AND STATE BOARD
FOLLOWING NCERT

Annual Exam Question Paper 2024

SESSION ENDING EXAMINATION (2023 – 24)
COMPUTER SCIENCE (083)
CLASS: XI
M.M.: 70 TIME: 3 HRS
General Instructions:
● Please check this question paper contains 35 questions.
● The paper is divided into 5 Sections- A, B, C, D and E.
● Section A, consists of 18 questions (1 to 18). Each question carries 1 Mark.
● Section B, consists of 7 questions (19 to 25). Each question carries 2 Marks.
● Section C, consists of 5 questions (26 to 30). Each question carries 3 Marks.
● Section D, consists of 2 questions (31 to 32). Each question carries 4 Marks.
● Section E, consists of 3 questions (33 to 35). Each question carries 5 Marks.
● All programming questions are to be answered using Python Language only.

Section – A
Each question carries 1 mark
1. Give one example for the following: 1
a) Utility Software
b) Language Processor
2. Name the Python modules which need to be imported to invoke the following functions: 1
a) randrange()
b) mean()
3. Which of the following is NOT done by cyber criminals? 1
a) Unauthorized account access
b) Mass attack using Trojans as botnets.
c) Email spooling and spamming
d) Report vulnerability in any system.
4. Predict output of the following statement: 1
print('Amrit Mahotsav @ 75'.partition(' '))
5. Let X be a number system having B symbols only. What will be the base value of this 1
number system.
6. What will be the output for following Code? 1
a=[1,2,(3,4)]
a[2][1]=5
print(a)
a) [1,2,(3,4)] (c)[1,2,5]
b) [1,2,(3,5)] (d) None of the above
7. Which of the following is/are NOT legal python string? 1
a) ‘abc’ + ‘abc’
b) ‘abc’*3
c) ‘abc’+3
d) ‘abc’*‘abc’
8. Answer in True or False: 1
a) Like ‘+’, all other arithmetic operators are also supported by strings.

b) A=[ ] and A=list() will produce the same result.
9. What will be the output for following Code? 1
p=7*8/5//2**1**3
print(p)

10. What can be done to reduce risk of identity theft? Write any two ways. 1
11. Use functions/objects from math module to write python expression for the mathematical 1
expression: |e2- x|
12. When do we need to use break statement in python programs? 1
13. Write two advantages of Python Programming Language. 1
14. Arrange the following in ascending order of memory capacity: 1
TB, Byte, KB, Nibble, PB, MB, GB
15. Suggest any two practices to ensure Communication Etiquettes over internet. 1
16. Things like online email account, social media account or handle, online shopping account, 1
online photo sharing account, trademarks, own registered domain name etc. are collectively
called _______________.
(a) Online Identity
(b) Online estate
(c) Digital identity
(d) Digital property
Q17 and 18 are ASSERTION AND REASONING based questions. Mark the correct choice
as
(a) Both A and R are True and R is the correct explanation for A
(b) Both A and R are True and R is not the correct explanation for A
(c) A is True but R is False
(d) A is False but R is True
(e) Both A and R are False
17. Assertion (A): Strings in Python are mutable. 1
Reason (R): The first character has the index 0 and the last character has the index n-1 where
n is the length of the string.
18. Assertion(A): clear() method removes all elements from the dictionary. 1
Reason(R): len() function cannot be used to find the length of a dictionary.

Section – B
Each question carries 2 marks
19. Fill in the blanks: 2
a) 10 KB is equivalent to ___________ bytes.
b) Complete the DeMorgan’s Law, A’+B’=____________.
c) (125)10 = ( ________ )16 = ( __________ )8
20. Predict the output of the Python code given below: 2
T=(1,2,3,4,5,6,7,8)
a) print (T [0])
b) print (T [3:4])
c) print (T [4:1])
d) print (T [2:6:2])
21. Consider a given list of numbers, write a program create another list which store half of each 2
even number and double of each odd number in the given list. Also, display the newly
created list.

For example, if given list L is [3,5,6,2,7,4,5,8] then new list should contain
[6,10,3,1,14,2,10,4]
22. Explain mutable and immutable data types using Python statements? Also, Give one 2
example data type of mutable and immutable data types.

23. Write a short note on the Act which enforces cyber laws in India. 2
OR
Differentiate between General Public License (GPL) and Creative Commons (CC) for
licensing digital Properties.
24. Write a program for checking whether the given character is uppercase, lowercase, digit or a 2
special symbol.
25. State the common gender and disability issues faced while teaching / using computers in 2
classrooms?

Section – C
Each question carries 3 marks
26. Write a program which takes a positive integer n as an input and prints nth term of Fibonacci 3
series.
Fibonacci sequence: 0, 1, 1, 2, 3, 5, 8, …
First and second term of series is fixed as 0 and 1, otherwise, each term is sum of two
previous terms [nth term = (n-1)th term+ (n-2)th term]
For example, 3rd term = sum of 2nd and 1st term
= 0+1 = 1 (3rd term)
27. Write a program to display and count the frequency of the characters of a given string using a 3
dictionary
For example:
inputstring= “banana”
The dictionary will be {‘b’:1, ‘a’: 3, ‘n’:2}
Output: frequency of b is: 1
frequency of a is: 3
frequency of n is: 2
28. Observe the following program and answer the questions that follow: 3
low=25
point =4
for i in range (1,5):
k= random.randint (1, point)
Number=low + k
print(Number, end=":")
point =point - 1
(a) What is the minimum and maximum value of Number? (1,
(b) Find out, which line of output(s) out of (i) to (iv) will not be expected from the program?
i.) 29: 26: 25: 28: ii.) 29: 28: 25: 26: 2)
iii.) 29: 26: 24: 28: iv.) 29: 26: 26: 25:
29. Shantanu wanted to gift his brother a football or a wrist watch. So, he searched them online. 3
But after that every time he goes online, his web browser shows him advertisements about
sports items and wrist watches.
(a) Why is this happening?
(b) How could have Shantanu avoided them?
(c) How can Shantanu get rid of this now?
30. Consider the following tuples: 3
t1 = (425, 617, 425, 123, 515, 425,123)

t2 = (777,222)
Find the output of the following statements:
a) print(t1.index(425))
b) print(t1.count(425))

c) print(t1 + t2)
d) print(sum(t2))
e) print(sorted(t1))
print(t1)
f) print(max(t2))

Section – D
Each question carries 4 marks
31. a) Rajat received an e-mail sent from a representative of Income Tax Department. The mail 4
required him to update his details using a given link. On clicking the link, he was taken (1,
to a site designed to imitate an official looking govt. site, such as rbi.gov. He uploaded
some important information on it.
Identify and briefly explain the cybercrime being discussed in the above scenario. 1,
b) What type of damages can be caused by viruses to your computer.
c) As a citizen of India, what advise you should give to others for e-waste disposal? 2)
32. a) Sunil got an assignment to write a python program which receives an integer and prints 4
the number after doubling it. He is not getting desired results, help Sunil to find and
correct the errors in his code given below: (1,
Number=input(“Enter Number”)
DoubleTheNumber = Number*2
Print(DoubleTheNumber)
b) Write a python program to print the following pattern:
____5
___45 3)
__345
_2345
12345

Section – E
Each question carries 5 marks
33. The record of a participant of Dance competition: Participant ID, Name, Score of 5 rounds 5
(out of 15) is stored in the following dictionary:
Data={‘id’:'JDJ15’,‘name’:‘Raj Dhingra’, ‘score’:[6,9,6,8,9]}
Write Python statements to retrieve the following information from the list Data.
a) display Overall Percentage score of the 5 performances.
b) Add the overall percentage score calculated above to dictionary Data.
c) Display Maximum score of the participant.
d) Update the Participant id from ‘JDJ15’ to ‘JDJ145’
e) Display the name of the Participant in upper case letters.
34. Write python statements using the most appropriate list method/function to perform the 5
following tasks:
Given a list L having some elements.
(a) Add a new element 100 as 4th element in the given list L
(b) Add a new element 100 at the last position of the list L
(c) Delete 2nd element from the given list L
(d) Delete the element 100 from the given list

(e) Add elements of another given list L2 in given list L

35. a) Differentiate between System Software and Application Software. 5 (1,
b) Draw the logic circuit diagram for the boolean expression: X=AB'+A’B+AB. Also, 2,
make a truth table to find the value of X.
c) Give brief description of ASCII encoding scheme. Also, expand ISCII. 2)
----:O:----

SESSION ENDING EXAMINATION (2023 – 24)
MARKING SCHEME – COMPUTER SCIENCE (083)
CLASS: XI
M.M.: 70 TIME: 3 HRS
Note: Accept all alternative correct code/ answers and give full or partial marks accordingly.
Section – A
Each question carries 1 mark
1. Give one example for the following: 1
a) Utilities:
Text Editor, Back Up Utility, Compression Utility, Disk Defragmentor
b) Language Processor: Assembler, Compiler, Interpreter
c) ½+ ½ mark for any correct example.
2. Name the Python modules which need to be imported to invoke the following functions: 1
½+ ½ mark for any correct answer
a) randrange(): random
b) mean(): statistics
3. Which of the following is NOT done by cyber criminals? 1
a) Unauthorized account access
b) Mass attack using Trojans as botnets.
c) Email spooling and spamming
d) Report vulnerability in any system. Correct Answer
4. Predict output of the following statement: 1
print('Amrit Mahotsav @ 75'.partition(' '))
('Amrit', ' ', 'Mahotsav @ 75') 1 Mark for Correct output
5. Let X be a number system having B symbols only. What will be the base value of this 1
number system.
Ans. B , 1 Mark for Correct Answer
6. What will be the output for following Code? 1
a=[1,2,(3,4)]

a[2][1]=5

Page 1 of 11

print(a)
a) [1,2,(3,4)] (c)[1,2,5]
b) [1,2,(3,5)] (d) None of the above, 1 Mark for Correct Answer
7. Which of the following is/are NOT legal python string? 1
a) ‘abc’ + ‘abc’
b) ‘abc’*3
c) ‘abc’+3
d) ‘abc’*‘abc’
Correct options c & d, ½ + ½ marks for correct answer.
8. Answer in True or False: 1
a) Like ‘+’, all other arithmetic operators are also supported by strings. FALSE
b) A=[ ] and A=list() will produce the same result. TRUE
½ + ½ marks for correct answer
9. What will be the output for following Code? 1
p=7*8/5//2**1**3
print(p)
Ans: 5.0 , 1 Mark for Correct Answer
10. What can be done to reduce risk of identity theft? Write any two ways. 1
 Be defensive with sensitive information
 Create strong passwords and keep them secret
 Protect your accounts and your credits
 Boost your computer’s security
 Use an identity theft monitoring solution
Or any other, ½ + ½ Mark for Correct Answer
11. Use functions/objects from math module to write python expression for the mathematical 1
expression: |e2- x|

Ans: math.fabs(math.exp(2)-x) or math.fabs(math.e**2-x) or any correct expression. 1
mark
12. When do we need to use break statement in python programs? 1
Ans: Python break statement is used to bring the control out of the loop when some external
condition is triggered. break statement is put inside the loop body (generally after if condition).
It terminates the current loop.
1 Mark for Correct Answer
13. Write two advantages of Python Programming Language. 1

 Extensive support libraries
 Open source and large active community base
 Versatile, easy to read, learn, and write

Page 2 of 11

 User-friendly data structures
 High-level language
 Dynamically typed language
 Object-Oriented and Procedural programming language
 Portable and interactive
 Highly efficient
 Interpreted language.
Or any other, ½ + ½ Mark for Correct Answer
14. Arrange the following in ascending order of memory capacity: 1
TB, Byte, KB, Nibble, PB, MB, GB
Ans: Nibble, Byte, KB, MB, GB, TB, PB - 1 Mark for Correct Answer
15. Suggest any two practices to ensure Communication Etiquettes over internet. 1
 Remember the Human
 Be ethical
 Know where you are
 Respect other people's time and data limits
 Make yourself look good online
 Share expert knowledge
 Keep disagreement healthy
 Respect other people's privacy
 Don't abuse your power
 Be forgiving of other people's mistakes
Or any other, ½ + ½ Mark for Correct Answer
16. Things like online email account, social media account or handle, online shopping account, 1
online photo sharing account, trademarks, own registered domain name etc. are collectively
called _______________.
(a) Online Identity
(b) Online estate
(c) Digital identity
(d) Digital property, 1 Mark for Correct Answer

Q17 and 18 are ASSERTION AND REASONING based questions. Mark the correct choice
as
(a) Both A and R are True and R is the correct explanation for A
(b) Both A and R are True and R is not the correct explanation for A
(c) A is True but R is False

(d) A is False but R is True
(e) Both A and R are False
17. Assertion (A): Strings in Python are mutable. FALSE 1

Page 3 of 11

Reason (R): The first character has the index 0 and the last character has the index n-1 where
n is the length of the string. TRUE
Ans: d, 1 Mark for Correct Answer
18. Assertion(A): clear() method removes all elements from the dictionary. TRUE 1
Reason(R): len() function cannot be used to find the length of a dictionary. FALSE
Ans:c 1 Mark for Correct Answer
Section – B
Each question carries 2 marks
19. Fill in the blanks: 2
a) 10 KB is equivalent to 10 x 210 or 10240 bytes.
b) Complete the DeMorgan’s Law, A’+B’=(AB)’.
c) (125)10 = ( 7D )16 = ( 175 )8
½ Mark for each Correct Answer for (a) and (b), 1 mark for correct answer of (c)
20. Predict the output of the Python code given below: 2
T=(1,2,3,4,5,6,7,8)
a) print (T [0])
b) print (T [3:4])
c) print (T [4:1])
d) print (T [2:6:2])
Answer:
a) 1
b) (4,)
c) () / Blank Tuple
d) (3, 5)
½ mark for each correct output .
21. Consider a given list of numbers, write a program create another list which store half of each 2
even number and double of each odd number in the given list. Also, display the newly created
list.
For example, if given list L is [3,5,6,2,7,4,5,8] then new list should contain [6,10,3,1,14,2,10,4]
Answer:

# L given List
k=[ ]
for i in L:
if i%2==0:
k.append(i//2)

Page 4 of 11

else:
k.append(2*i)
print(k)
For correct solution 2 or partial marks
22. Explain mutable and immutable data types using Python statements? Also, Give one example 2
data type of mutable and immutable data types.
Ans: Mutable data types: Data types where the value can be changed in place. Example:
dictionary, sets, lists etc.
Immutable data types: Data types where the values cannot be changed in place.
Example: integer, float, string, tuples etc.

1 mark for correct description, ½ mark for each correct example or partial marks
23. Write a short note on the Act which enforces cyber laws in India. 2
2 marks for correct description or partial marks
OR
Differentiate between General Public License (GPL) and Creative Commons (CC) for
licensing digital Properties.
1 +1 mark of any two correct differences.
24. Write a program for checking whether the given character is uppercase, lowercase, digit or a 2
special symbol.
Answer:
char = input('enter a character : ')
if (char.isalpha()):
if (char.isupper()):
print(char, "is an uppercase letter")
else:
print(char, "is a lowercase letter")
elif (char.isdigit()):
print(char, "is a Digit")
else:
print(char, "is an Special Character")
2 or relevant marks according to solution
25. State the common gender and disability issues faced while teaching / using computers in 2
classrooms?

1 +1 mark of atleast two correct points
Section – C

Page 5 of 11

Each question carries 3 marks

26. Write a program which takes a positive integer n as an input and prints n th term of Fibonacci 3
series.
Fibonacci sequence: 0, 1, 1, 2, 3, 5, 8, …
First and second term of series is fixed as 0 and 1, otherwise, each term is sum of two previous
terms [nth term = (n-1)th term+ (n-2)th term]
For example, 3rd term = sum of 2nd and 1st term
= 0+1 = 1 (3rd term)
Answer:
n=int(input(“Enter the serial number of required term”)
a=0
b=1
if n == 0:
print(a)
elif n == 1:
print(b)
else:
for i in range(2, n):
c=a+b
a=b
b=c
print(b)
3 or relevant marks.
27. Write a program to display and count the frequency of the characters of a given string using a 3
dictionary
For example:
inputstring= “banana”
The dictionary will be {‘b’:1, ‘a’: 3, ‘n’:2}
Output: frequency of b is: 1
frequency of a is: 3
frequency of n is: 2
Answer:
s = input(“Enter String:”)

f = {}
for e in s:
if e in f:
f[e] += 1

Page 6 of 11

else:
f[e] = 1
for i in f:
print("Occurrence of", i, "in", s, "is", f[i] )

1 mark for correct logic
1 mark for making correct dictionary
1 mark for correct output
28. Observe the following program and answer the questions that follow: 3
low=25
point =4
for i in range (1,5):
k= random.randint (1, point)
Number=low + k
print(Number, end=":")
point =point - 1
(a) What is the minimum and maximum value of Number? (1,
(b) Find out, which line of output(s) out of (i) to (iv) will not be expected from the program?
2)
i.) 29: 26: 25: 28: ii.) 29: 28: 25: 26:
iii.) 29: 26: 24: 28: iv.) 29: 26: 26: 25:
Answer:
a) minimum=26 and maximum=29
b) No option is expected in the output.

29. Shantanu wanted to gift his brother a football or a wrist watch. So, he searched them online. 3
But after that every time he goes online, his web browser shows him advertisements about
sports items and wrist watches.
(a) Why is this happening?
(b) How could have Shantanu avoided them?
(c) How can Shantanu get rid of this now?
Answer:
(a) This is happening because third party cookies saved his search preferences and now
websites are posting advertisements based on his preferences.
(b) Shantanu could have avoided this by privately browsing i.e. opening the web browser in

incognito mode before searching for such things.
(c) Now Shantanu can delete all the previous history and cookies stored on his computer. This
would stop websites posting advertisements.

Page 7 of 11

1 +1+1 mark for each correct part.
30. Consider the following tuples: 3
t1 = (425, 617, 425, 123, 515, 425,123)
t2 = (777,222)
Find the output of the following statements:
a) print(t1.index(425))
b) print(t1.count(425))
c) print(t1 + t2)
d) print(sum(t2))
e) print(sorted(t1))
print(t1)
f) print(max(t2))
Answer:
(a) 0
(b) 3
(c) (425, 617, 425, 123, 515, 425,123, 777, 222)
(d) 999
(e) [123, 123, 425, 425, 425, 515, 617]
(425, 617, 425, 123, 515, 425, 123)
(f) 777
½ mark for each correct part.
Section – D
Each question carries 4 marks
31. a) Rajat received an e-mail sent from a representative of Income Tax Department. The mail 4
required him to update his details using a given link. On clicking the link, he was taken
(1,
to a site designed to imitate an official looking govt. site, such as rbi.gov. He uploaded
some important information on it.
Identify and briefly explain the cybercrime being discussed in the above scenario.
1,
b) What type of damages can be caused by viruses to your computer?
c) As a citizen of India, what advise you should give to others for e-waste disposal? 2)

Answer:
a) Phishing, 1 mark for correct identification and description
b) ½ + ½ mark of any two correct points

Page 8 of 11

c) 1 +1 mark of any two correct points
32. a) Sunil got an assignment to write a python program which receives an integer and prints the 4
number after doubling it. He is not getting desired results, help Sunil to find and correct the
(1,
errors in his code given below:
Number=input(“Enter Number”)
DoubleTheNumber = Number*2
Print(DoubleTheNumber)
3)
Answer:
Number=int(input(“Enter Number”)) # int function
DoubleTheNumber = Number*2
print(DoubleTheNumber) # p of Print should be in lowercase

½ + ½ marks for identification and correction.
b) Write a python program to print the following pattern:
____5
___45
__345
_2345
12345
Answer:
k=4
for i in range(1,6):
for j in range(0,k):
print('_', end=" ")
for j in range(k+1,6):
print(j, end=" ")
k=k-1
print()
1+1 mark for each correct loop
1 mark for correct print statement
Section – E
Each question carries 5 marks

Page 9 of 11

33. The record of a participant of Dance competition: Participant ID, Name, Score of 5 rounds 5
(out of 15) is stored in the following dictionary:
Data={‘id’:'JDJ15’,‘name’:‘Raj Dhingra’, ‘score’:[6,9,6,8,9]}
Write Python statements to retrieve the following information from the list Data.
a) display Overall Percentage score of the 5 performances.
b) Add the overall percentage score calculated above to dictionary Data.
c) Display Maximum score of the participant.
d) Update the Participant id from ‘JDJ15’ to ‘JDJ145’
e) Display the name of the Participant in upper case letters.
Answers:
a) print(sum(Data[‘score’])/5)
b) Data[percent]=sum(Data[‘score’])/5
c) print(max(Data[‘score’])
d) Data[‘id’]=‘JDJ145’
e) print(Data[‘name’].upper())
1 mark for each correct statement.
34. Write python statements using the most appropriate list method/function to perform the 5
following tasks:
Given a list L having some elements.
(a) Add a new element 100 as 4th element in the given list L
(b) Add a new element 100 at the last position of the list L
(c) Delete 2nd element from the given list L
(d) Delete the element 100 from the given list
(e) Add elements of another given list L2 in given list L
Answer:
(a) L.insert(4,100)
(b) L.append(100)
(c) L.pop(1)
(d) L.remove(100)
(e) L.extend(L2)
For each

½ mark for use of correct list methods, ½ mark for correct statement.

Page 10 of 11

35. a) Differentiate between System Software and Application Software. 5
(1,
1 mark for correct for correct differences
b) Draw the logic circuit diagram for the boolean expression: X=AB'+A’B+AB. Also, make 2,
a truth table to find the value of X.
1 mark for correct circuit and 1 mark for correct truth table. 2)
c) Give brief description of ASCII encoding scheme. Also, expand ISCII.
1 mark for correct description, 1 mark for correct expansion
----:O:----

AglaSem Earn while Learn Program.
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