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GATE 2023 CS question paper with official answer key

The complete GATE 2023 Computer Science and Information Technology (CS) paper: 65 questions for 100 marks, with the official answer to every question. Try each question first, then open its answer, or practise the whole paper free with a 3-hour timer and your score.

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GATE 2023 CS paper at a glance

Questions
65
Total marks
100
General Aptitude
10 questions · 15 marks
CS subject
55 questions · 85 marks
Question types
34 MCQ · 15 MSQ · 16 NAT
Duration
3 hours

In GATE, each MCQ carries 1 or 2 marks; a wrong MCQ answer costs one-third of its marks (−1/3 for a 1-mark and −2/3 for a 2-mark question). MSQ (multiple select) and NAT (numerical answer) questions have no negative marking. In this paper, 1 question was dropped by GATE and given full marks to everyone.

All 65 questions

Each question is shown exactly as in the official paper. Tap “Show answer” to check yourself.

Q.1 · General Aptitude · 1 mark · MCQ

GATE 2023 CS question 1
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Answer: B

Q.2 · General Aptitude · 1 mark · MCQ

GATE 2023 CS question 2
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Answer: Marks to all (question dropped)

Q.3 · General Aptitude · 1 mark · MCQ

GATE 2023 CS question 3
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Answer: A

Q.4 · General Aptitude · 1 mark · MCQ

GATE 2023 CS question 4
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Answer: A

Q.5 · General Aptitude · 1 mark · MCQ

GATE 2023 CS question 5
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Answer: C

Q.6 · General Aptitude · 2 marks · MCQ

GATE 2023 CS question 6
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Answer: D

Q.7 · General Aptitude · 2 marks · MCQ

GATE 2023 CS question 7
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Answer: C

Q.8 · General Aptitude · 2 marks · MCQ

GATE 2023 CS question 8
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Answer: D

Q.9 · General Aptitude · 2 marks · MCQ

GATE 2023 CS question 9
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Answer: B

Q.10 · General Aptitude · 2 marks · MCQ

GATE 2023 CS question 10
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Answer: A

Q.11 · CS · 1 mark · MCQ

GATE 2023 CS question 11
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Answer: B

Q.12 · CS · 1 mark · MCQ

GATE 2023 CS question 12
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Answer: B

Q.13 · CS · 1 mark · MCQ

GATE 2023 CS question 13
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Answer: D

Q.14 · CS · 1 mark · MCQ

GATE 2023 CS question 14
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Answer: C

Q.15 · CS · 1 mark · MCQ

GATE 2023 CS question 15
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Answer: A

Q.16 · CS · 1 mark · MCQ

GATE 2023 CS question 16
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Answer: A

Q.17 · CS · 1 mark · MCQ

GATE 2023 CS question 17
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Answer: B

Q.18 · CS · 1 mark · MCQ

GATE 2023 CS question 18
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Answer: B

Q.19 · CS · 1 mark · MCQ

GATE 2023 CS question 19
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Answer: C

Q.20 · CS · 1 mark · MCQ

GATE 2023 CS question 20
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Answer: C

Q.21 · CS · 1 mark · MCQ

GATE 2023 CS question 21
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Answer: B

Q.22 · CS · 1 mark · MSQ

GATE 2023 CS question 22
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Answer: B, C, D

Q.23 · CS · 1 mark · MSQ

GATE 2023 CS question 23
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Answer: C, D

Q.24 · CS · 1 mark · MSQ

GATE 2023 CS question 24
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Answer: A, C, D

Q.25 · CS · 1 mark · MSQ

GATE 2023 CS question 25
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Answer: A, C

Q.26 · CS · 1 mark · MSQ

GATE 2023 CS question 26
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Answer: B, C

Q.27 · CS · 1 mark · MSQ

GATE 2023 CS question 27
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Answer: A, C, D or C, D

Q.28 · CS · 1 mark · MSQ

GATE 2023 CS question 28
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Answer: B, D

Q.29 · CS · 1 mark · MSQ

GATE 2023 CS question 29
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Answer: A, C

Q.30 · CS · 1 mark · NAT

GATE 2023 CS question 30
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Answer: 2 or 4

Q.31 · CS · 1 mark · NAT

GATE 2023 CS question 31
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Answer: 0

Q.32 · CS · 1 mark · NAT

GATE 2023 CS question 32
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Answer: 110

Q.33 · CS · 1 mark · NAT

GATE 2023 CS question 33
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Answer: 2040

Q.34 · CS · 1 mark · NAT

GATE 2023 CS question 34
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Answer: 10.2

Q.35 · CS · 1 mark · NAT

GATE 2023 CS question 35
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Answer: 7

Q.36 · CS · 2 marks · MCQ

GATE 2023 CS question 36
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Answer: A

Q.37 · CS · 2 marks · MCQ

GATE 2023 CS question 37
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Answer: D

Q.38 · CS · 2 marks · MCQ

GATE 2023 CS question 38
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Answer: C

Q.39 · CS · 2 marks · MCQ

GATE 2023 CS question 39
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Answer: B

Q.40 · CS · 2 marks · MCQ

GATE 2023 CS question 40
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Answer: A

Q.41 · CS · 2 marks · MCQ

GATE 2023 CS question 41
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Answer: B

Q.42 · CS · 2 marks · MCQ

GATE 2023 CS question 42
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Answer: C

Q.43 · CS · 2 marks · MCQ

GATE 2023 CS question 43
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Answer: A

Q.44 · CS · 2 marks · MCQ

GATE 2023 CS question 44
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Answer: C

Q.45 · CS · 2 marks · MCQ

GATE 2023 CS question 45
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Answer: C

Q.46 · CS · 2 marks · MCQ

GATE 2023 CS question 46
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Answer: B

Q.47 · CS · 2 marks · MCQ

GATE 2023 CS question 47
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Answer: C

Q.48 · CS · 2 marks · MCQ

GATE 2023 CS question 48
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Answer: D

Q.49 · CS · 2 marks · MSQ

GATE 2023 CS question 49
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Answer: B, C, D

Q.50 · CS · 2 marks · MSQ

GATE 2023 CS question 50
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Answer: B, C, D

Q.51 · CS · 2 marks · MSQ

GATE 2023 CS question 51
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Answer: A, D

Q.52 · CS · 2 marks · MSQ

GATE 2023 CS question 52
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Answer: C, D

Q.53 · CS · 2 marks · MSQ

GATE 2023 CS question 53
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Answer: C, D

Q.54 · CS · 2 marks · MSQ

GATE 2023 CS question 54
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Answer: A, D

Q.55 · CS · 2 marks · MSQ

GATE 2023 CS question 55
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Answer: A, B

Q.56 · CS · 2 marks · NAT

GATE 2023 CS question 56
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Answer: 5040

Q.57 · CS · 2 marks · NAT

GATE 2023 CS question 57
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Answer: 4096

Q.58 · CS · 2 marks · NAT

GATE 2023 CS question 58
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Answer: 5

Q.59 · CS · 2 marks · NAT

GATE 2023 CS question 59
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Answer: 8

Q.60 · CS · 2 marks · NAT

GATE 2023 CS question 60
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Answer: 2.374 to 2.376

Q.61 · CS · 2 marks · NAT

GATE 2023 CS question 61
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Answer: 2

Q.62 · CS · 2 marks · NAT

GATE 2023 CS question 62
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Answer: 6

Q.63 · CS · 2 marks · NAT

GATE 2023 CS question 63
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Answer: 4

Q.64 · CS · 2 marks · NAT

GATE 2023 CS question 64
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Answer: 19

Q.65 · CS · 2 marks · NAT

GATE 2023 CS question 65
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Answer: 3

GATE 2023 CS official answer key

From the official GATE answer key ↗. Numerical answers are accepted anywhere in the range shown.

Q.SectionTypeMarksAnswer
1GAMCQ1B
2GAMCQ1Marks to all (question dropped)
3GAMCQ1A
4GAMCQ1A
5GAMCQ1C
6GAMCQ2D
7GAMCQ2C
8GAMCQ2D
9GAMCQ2B
10GAMCQ2A
11CSMCQ1B
12CSMCQ1B
13CSMCQ1D
14CSMCQ1C
15CSMCQ1A
16CSMCQ1A
17CSMCQ1B
18CSMCQ1B
19CSMCQ1C
20CSMCQ1C
21CSMCQ1B
22CSMSQ1B, C, D
23CSMSQ1C, D
24CSMSQ1A, C, D
25CSMSQ1A, C
26CSMSQ1B, C
27CSMSQ1A, C, D or C, D
28CSMSQ1B, D
29CSMSQ1A, C
30CSNAT12 or 4
31CSNAT10
32CSNAT1110
33CSNAT12040
34CSNAT110.2
35CSNAT17
36CSMCQ2A
37CSMCQ2D
38CSMCQ2C
39CSMCQ2B
40CSMCQ2A
41CSMCQ2B
42CSMCQ2C
43CSMCQ2A
44CSMCQ2C
45CSMCQ2C
46CSMCQ2B
47CSMCQ2C
48CSMCQ2D
49CSMSQ2B, C, D
50CSMSQ2B, C, D
51CSMSQ2A, D
52CSMSQ2C, D
53CSMSQ2C, D
54CSMSQ2A, D
55CSMSQ2A, B
56CSNAT25040
57CSNAT24096
58CSNAT25
59CSNAT28
60CSNAT22.374 to 2.376
61CSNAT22
62CSNAT26
63CSNAT24
64CSNAT219
65CSNAT23

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