CBSE Class 12 Computer Science Sample Paper For 2024-25 A Complete Guide To Boost Your Preparation | TutorialAICSIP

CBSE Class 12 Computer Science Sample Paper for 2024-25

The CBSE Class 12 Computer Science Sample Paper for 2024-25 is now available, and it’s time for students to kick-start their exam preparation with this essential resource. CBSE releases sample papers every year to give students an understanding of the exam pattern, types of questions, and the marking scheme. The Computer Science sample paper is a vital tool for students aiming to excel in their board exams.

In this blog, we’ll break down the CBSE Class 12 Computer Science Sample Paper for 2024-25, cover the latest exam pattern, tips for preparation, and how to make the best use of this paper to score high marks.

Why is the CBSE Class 12 Computer Science Sample Paper for 2024-25 Important?

The CBSE 2024-25 sample paper for Computer Science helps students familiarize themselves with:

• Exam Pattern: Understanding how questions are structured across different sections.
• Type of Questions: Identifying important concepts and topics that carry weight.
• Time Management: Practicing under timed conditions helps develop exam discipline.

By solving the sample paper, students can assess their knowledge, identify weak areas, and improve their accuracy and speed before the final exam.

CBSE Class 12 Computer Science Exam Pattern 2024-25

For the 2024-25 session, the CBSE Computer Science exam will follow a well-structured format. Here’s an overview:

Section A – CBSE Class 12 Computer Science Sample Paper for 2024-25

[1] State True or False: The Python interpreter handles logical errors during code execution.

Ans.:False
The python interpreter not handle any logical error during code execution. Logical errors generates an incorrect output or inappropriate output as logical errors are mistakes committed by the programmers in code.

[2] Identify the output of the following code snippet:

text = "PYTHONPROGRAM"
text=text.replace('PY','#')
print(text)

(A) #THONPROGRAM
(B) ##THON#ROGRAM
(C) #THON#ROGRAM
(D) #YTHON#ROGRAM

Ans.: (A) #THONPROGRAM
The replace method ‘PY’ with ‘#’. The word PYTHONPROGRAM contains PY once and # will be replaced with that.

[3] Which of the following expressions evaluates to False?
(A) not(True) and False
(B) True or False
(C) not(False and True)
(D) True and not(False)

[4] What is the output of the expression?

str="International"
print(str.split("n"))

(A) (‘I’, ‘ter’, ‘atio’, ‘al’)
(B) [‘I’, ‘ter’, ‘atio’, ‘al’]
(C) [‘I’, ‘n’, ‘ter’, ‘n’, ‘atio’, ‘n’, ‘al’]
(D) Error

Ans.: (B) [‘I’, ‘ter’, ‘atio’, ‘al’]
The split method will split the word from the specified word or letter and returns a list of remaining words.

[5] What will be the output of the following code snippet?

str= "World Peace" 
print(str[-2::-2])

Ans.: ce lo
-2 in starting position will start the slicing from second last character of string. Here the second last character is ‘c’, and the stop value is not specified, and step value is -2 so the slicing moves 2 steps from right side. So after ‘c’ it will moves to ‘e’ then space then ‘l’ then ‘o’. Hence output is ‘ce lo’.

[6] What will be the output of the following code?

tuple1 = (1, 2, 3) 
tuple2 = tuple1 
tuple1 += (4,) 
print(tuple1 == tuple2)

(A) True

(B) False

(C) tuple1

(D) Error

Ans.: (B) False
Here
tuple2 = tuple1 is given so tuple1 is copies into tuple2. Hence tuple2=(1,2,3)
tuple1+=(4) changes into tuple1, Hence tuple1=(1,2,3,4)
Now tuple1==tuple2 which are not similar. So output is False.

[7] If my_dict is a dictionary as defined below, then which of the following statements will raise an exception?

my_dict = {‘apple’: 10, ‘banana’: 20, ‘orange’: 30}

(A) my_dict.get(‘orange’)

(B) print(my_dict[‘apple’, ‘banana’])

(C) my_dict[‘apple’]=20

(D) print(str(my_dict))

Ans.: (B) print(my_dict[‘apple’,’banana’])
(A) my_dict.get(‘orange’) will return the value of orange i.e. 30
(B) Dictionary will never access multiple keys and raise KeyError exception.
(C) This statement will change the value apple to 20
(D) This statement will print dictionary as a string.

[8] What does the list.remove(x) method do in Python?

(A) Removes the element at index x from the list

(B) Removes the first occurrence of value x from the list

(C) Removes all occurrences of value x from the list

(D) Removes the last occurrence of value x from the list

Ans.: (B) Removes the first occurrence of value x from the list
(A), (C) and (D) are not relevant

[9] Which of the following statements will cause an error?
(A) t=1,
(B) t=(1,)
(C) t=(1)
(D) t=tuple(1)

Ans.: (D) t=tuple(1)
(A) t=1, and (B) t = (1,) initialize a tuple with a single element 1
(C) t=(1) initialize t as an integer

[10] Write the missing statement to complete the following code:

file = open("example.txt", "r") 
data = file.read(100) 
____________________ #Move the file pointer to the beginning of the file 
next_data = file.read(50) 
file.close()

Ans.: file.seek(0) or file.seek(0,0)

To understand this concept, watch this video:

[11] State whether the following statement is True or False: “The finally block in Python is executed only if no exception occurs in the try block.”

Ans.: False
The finally clause always executes at the end.

[12] What will be the output of the following code?

c = 10 
def add(): 
   global c 
   c = c + 2 
   print(c,end='#') 
add() 
c=15 
print(c,end='%')

(A) 12%15#

(B) 15#12%

(C) 12#15%

(D) 12%15#

Ans.: (C) 12#15%
c=10
In add() function c changes the value as declared as global variable, c=c+2=12.
The print() function prints 12#.
Now c=15 initialize the c as 15. Hence print() function accepts value as 15, and prints 15%.
Hence option (C) 12#15% is correct output.

[13] Which SQL command can change the degree of an existing relation?

Ans.: Alter table command
The degree of relations refers to no. of columns present in the relation.
The alter table command is used to add or remove column from the table.

[14] What will be the output of the query?

SELECT * FROM products WHERE product_name LIKE ‘App%’;

(A) Details of all products whose names start with ‘App’

(B) Details of all products whose names end with ‘App’

(C) Names of all products whose names start with ‘App’

(D) Names of all products whose names end with ‘App’

Ans.: (A) Details of all products whose names start with ‘App’
(B) To print all products whose names end with ‘App’ where condition requires product_name like ‘%App’
(C) and (D) For Names of all products requires name column in select clause

[15] In which datatype the value stored is padded with spaces to fit the specified length.
(A) DATE
(B) VARCHAR

(C) FLOAT
(D) CHAR

Ans.: (D) CHAR
(D) The DATE datatype stores the date values and its almost fixed for all values
(B) The VARCHAR data type occupies the length of values used in the field
(C) The FLOAT data type store the fractional values

[16] Which aggregate function can be used to find the cardinality of a table?
(A) sum()
(B) count()
(C) avg()
(D) max()

Ans.: (B) count()
Cardinality refers to no. of tuples or rows of table. Here the count(*) function will return number of rows present in the relation.
(A) sum() functions returns the sum of field values.
(C) avg() returns average of field values.
(D) max() returns maximum values from selected field values

[17] Which protocol is used to transfer files over the Internet?
(A) HTTP
(B) FTP
(C) PPP
(D) HTTPS

Ans.: (B) FTP
FTP stands for File Transfer Protocol
(A) HTTTP protocol is used to exchange data over the web
(C) PPP allows two routers to connect directly without any host or other networking in between.
(D) HTTPS secured version of HTTP

[18] Which network device is used to connect two networks that use different protocols?

(A) Modem

(B) Gateway

(C) Switch

(D) Repeater

Ans.: (B) Gateway
(A) Modem is used to convert analog signals to digital signals
(C) Switch two or more IT devices, such as computers, to communicate with one another
(D) Repeater is used to amplify and generate the incoming signal

[19] Which switching technique breaks data into smaller packets for transmission, allowing multiple packets to share the same network resources?

Ans.: (B) Packet Switching
– Circuit switching technique establishes a dedicated path between sender and receiver
– Message switching transfers a message as a whole unit and routed through intermediate node at which it is stored and forwarded

Q20 and Q21 are Assertion(A) and Reason(R) 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

[20] Assertion (A): In the case of positional arguments, the function call and function definition statements match in terms of the number and order of arguments.

Reasoning (R): During a function call, positional arguments should precede keyword arguments in the argument list.

Ans.: (B) Both A and R are true and R is not the correct explanation for A
Positional arguments order must be followed where in keyword arguments order doesn’t matter

[21] Assertion (A): A SELECT command in SQL can have both WHERE and HAVING clauses.

Reasoning (R): WHERE and HAVING clauses are used to check conditions, therefore, these can be used interchangeably.

Ans.: (C) A is True, R is false
Where is used with select clause and having is used with group by clause.

How to Make the Best Use of CBSE Class 12 Computer Science Sample Paper 2024-25

1. Understand the Paper Structure

   Before you begin solving, familiarize yourself with the layout of the sample paper. Know how much time to allocate to each section based on your strengths and weaknesses.

2. Focus on Python Programming

   Python programming is central to the exam. Ensure that you are confident in concepts like object-oriented programming, file handling, and data structures (stacks, queues). Practice coding questions daily.

3. Master SQL Queries

   SQL is a scoring area. Practice writing SQL queries for retrieving, manipulating, and updating data in databases.

4. Tackle Networking with Confidence

   Networking concepts like protocols, Internet basics, and cybersecurity are easy to grasp with regular revision. Make sure you understand network models and topologies well.

5. Attempt Case Study Questions Smartly

   Case study/competency based questions test your ability to apply theoretical knowledge to real-world scenarios. Read the case carefully and ensure that you understand the problem before attempting to answer.

6. Solve the Sample Paper Under Exam Conditions

   Time management is key in the CBSE board exams. Practice solving the sample paper in 3 hours to simulate real exam conditions and improve speed and accuracy.

Tips for Scoring High in CBSE Class 12 Computer Science Exam 2024-25

1. Understand Concepts Deeply: Avoid rote learning. Focus on understanding the logic behind programming, databases, and networks to answer application-based questions effectively.
2. Practice Regularly: The more you practice, the more confident you will be. Regularly solve previous years’ question papers and sample papers to improve problem-solving skills.
3. Revise Thoroughly: Don’t skip revision. Use flowcharts, diagrams, and notes to revise key topics in Python, SQL, and networking.
4. Focus on Case Studies: Be well-prepared for case study questions as they test your ability to apply theoretical knowledge practically.
5. Time Management: Allocate time to each section during your preparation and avoid spending too much time on one question during the actual exam.

The CBSE Class 12 Computer Science Sample Paper for 2024-25 is an indispensable tool for exam preparation. By solving the sample paper and following a systematic study plan, you can significantly improve your chances of scoring well in the board exams. Focus on mastering Python, SQL, and networking concepts, and regularly practice to boost your confidence. With the right strategy, you can ace the CBSE Class 12 Computer Science exam!

Prepare well, stay consistent, and you’ll be ready to tackle the board exam with confidence.

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