CBSE Class 12 Computer Science Analysis, Review & Question Paper with Answer Key Exam 2023

On Monday, 20 March 2023, the CBSE board conducted the class 12 Computer Science board exam 2023 from 10.30 am to 1.30 pm. The exam was for 70 marks and students had 3 hours to attempt the paper. The exam got over at 1.30 pm. In this article, we have provided the exam analysis and question papers from CBSE Class 12 Computer Science board exam 2023 held today.

You can also check the answer key prepared by subject experts from the link given in this website.

CBSE Class 12th Computer Science Question Paper With Answer Key

CBSE Class 12 Computer Science Paper Review 2023

Class 12th Computer Science Question Paper 2023 was described as easy by most of the students. The questions were from the syllabus, mostly similar to what the board provided in the sample papers.

Type of Questions asked in Today’s Computer Science Exam

• The question paper contained five sections, Sections A to E.
• All questions were compulsory.
• Section A had 18 questions carrying 01 mark each.
• Section B had 07 Very Short Answer type questions carrying 02 marks each.
• Section C had Short Answer type questions carrying 03 marks each.
• Section D had 03 Long Answer type questions carrying 05 marks each.
• Section E had 02 questions carrying 04 marks each.

Challenging Areas in Computer Science Questions

While the subject experts unanimously believed that no specific area of the questions were more challenging than the rest, students were divided in their opinion about the programming questions being of a higher difficulty level than the objective theoretical questions.

CBSE Class 12 Computer Science 2023 Answer Key 

1. State True or False.

“Identifiers are names used to identify a variable, function in a program”.

Answer: True

2. Which of the following is a valid keyword in Python?

(a) false

(b) return

(c) non local

(d) none

Answer: (b) return

3. Given the following Tuple Tup- (10, 20, 30, 50)

Which of the following statements will result in an error?

(a) print (Tup[0])

(b) Tup.insert (2,3)

(c) print (Tup[1:2])

(d) print (len (Tup))

Answer: (b) Tup.insert (2,3)

4. Consider the given expression: 5<10 and 12>7 or not 7>4

Which of the following will be the correct output, if the given expression is evaluated?

(a) True

(b) False

(c) NONE

(d) NULL

Answer: (a) True

5. Select the correct output of the code: 

“Amrit Mahotsav @ 75”

A=S.partition (“  “)

print (a)

(a)(Amrit Mahotsav’, ‘@’, ’75)

(b)[‘Amrit’, ‘Mahotsav’, ‘@’, ’75]

(c) (‘Amrit’, ‘Mahotsav’ @ 75′)

(d) (‘Amrit’,’’, ‘Mahotsav @ 75’)

Answer: (b)[‘Amrit’, ‘Mahotsav’, ‘@’, ’75]

6. Which of the following mode keeps the file offset position at the end of the file?

(a) r+

(b) r

(c) w

(d) a

Answer: (a) r+

7. Fill in the blanks.

_______function is used to arrange the elements of a list in ascending order.

(a) sort()

(b) ascending ()

(c) arrange ()

(d) asort()

Answer: (a) sort()

8. Which of the following operations will return either True or False?

(a) +=

(b) !=

(c) =

(d) *=

Answer: (b) !=

9. Which of the following statement(s) would give an error after executing the following code?

Stud (“Murugan”:100,”Mithu”:95) #Statement 1

print (Stud[95]) # Statement 2

Stud [“Murugan”]=99 # Statement 3

print (Stud.pop()) # Statement 4

print (Stud) # Statement 5

(a) Statement 2

(c) Statement 4

(b) Statement 3

(d) Statements 2 and 4

Answer: (d) Statements 2 and 4

10. Fill in the blank.

_____is the number of tuples in a relation.

(a) Attribute

(b) Degree

(c) Domain

(d) Cardinality

Answer: (d) Cardinality

11. The syntax of seek() is : 

file_object.seek (offset [, reference_point]) 

What is the default value of reference_point? 

(a) 0

(b) 1

(c) 2

(d) 3

Answer: (a) 0

12. Fill in the blank: 

_______clause is used with SELECT statement to display data in a sorted form with respect to a specified column. 

(a) WHERE

(b) ORDER BY

(c) HAVING

(d) DISTINCT

Answer: (b) ORDER BY

13. Fill in the blank:

__________is used for point-to-point communication or unicast communication such as radar and satellite.

(a) INFRARED WAVES

(c) MICROWAVES

(b) BLUETOOTH

(d) RADIOWAVES

Answer: (c) MICROWAVES

14. What will the following expression be evaluated to in Python? 

/print (4+3 5/3-5%2)

(a) 8.5

(b) 8.0

(c) 10.2

(d) 10.0

Answer: (c) 10.2

15. Which function returns the sum of all elements of a list?

(a) count()

(b) sum ()

(c) total()

(d) add()

Answer: (a) count()

16. fetchall0 method fetches all rows in a result set and returns a:

(a) Tuple of lists

(c) List of strings

(b) List of tuples

(d) Tuple of strings

Answer: (b) List of tuples

Q. 17 and 18 are ASSERTION (A) and REASONING (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.

17. Assertion (A): To use a function from a particular module, we need to import the module.

Reason (R): import statement can be written anywhere in the program, before using a function from that module.

Answer: 

18. Assertion (A): A stack is a LIFO structure.

Reason (R): Any new element pushed into the stack always gets positioned at the index after the last existing element in the stack.

CBSE Class 12 Result Date 2023

CBSE Class 12 board exam results will be declared (tentatively) in June 2023.

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