Home › GATE previous year papers › GATE CS › 2026 Set 1
GATE 2026 CS question paper with official answer key (Set 1)
The complete GATE 2026 Computer Science and Information Technology (CS) Set 1 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.
GATE 2026 CS paper at a glance
- Questions
- 65
- Total marks
- 100
- General Aptitude
- 10 questions · 15 marks
- CS subject
- 55 questions · 85 marks
- Question types
- 28 MCQ · 24 MSQ · 13 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.
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
Show answer
Answer: B
Q.2 · General Aptitude · 1 mark · MCQ
Show answer
Answer: C
Q.3 · General Aptitude · 1 mark · MCQ
Show answer
Answer: C
Q.4 · General Aptitude · 1 mark · MCQ
Show answer
Answer: D
Q.5 · General Aptitude · 1 mark · MCQ
Show answer
Answer: C
Q.6 · General Aptitude · 2 marks · MCQ
Show answer
Answer: B
Q.7 · General Aptitude · 2 marks · MCQ
Show answer
Answer: D
Q.8 · General Aptitude · 2 marks · MCQ
Show answer
Answer: A
Q.9 · General Aptitude · 2 marks · MCQ
Show answer
Answer: A
Q.10 · General Aptitude · 2 marks · MCQ
Show answer
Answer: C
Q.11 · CS · 1 mark · MCQ
Show answer
Answer: B
Q.12 · CS · 1 mark · MCQ
Show answer
Answer: A
Q.13 · CS · 1 mark · MCQ
Show answer
Answer: A
Q.14 · CS · 1 mark · MCQ
Show answer
Answer: B
Q.15 · CS · 1 mark · MCQ
Show answer
Answer: D
Q.16 · CS · 1 mark · MCQ
Show answer
Answer: B
Q.17 · CS · 1 mark · MCQ
Show answer
Answer: A
Q.18 · CS · 1 mark · MCQ
Show answer
Answer: D
Q.19 · CS · 1 mark · MSQ
Show answer
Answer: A, C, D
Q.20 · CS · 1 mark · MSQ
Show answer
Answer: B, D
Q.21 · CS · 1 mark · MSQ
Show answer
Answer: A, C
Q.22 · CS · 1 mark · MSQ
Show answer
Answer: B, C
Q.23 · CS · 1 mark · MSQ
Show answer
Answer: B, C
Q.24 · CS · 1 mark · MSQ
Show answer
Answer: C
Q.25 · CS · 1 mark · MSQ
Show answer
Answer: A, B, C
Q.26 · CS · 1 mark · MSQ
Show answer
Answer: B, D
Q.27 · CS · 1 mark · MSQ
Show answer
Answer: C
Q.28 · CS · 1 mark · MSQ
Show answer
Answer: C
Q.29 · CS · 1 mark · MSQ
Show answer
Answer: A, C
Q.30 · CS · 1 mark · MSQ
Show answer
Answer: C, D
Q.31 · CS · 1 mark · MSQ
Show answer
Answer: A, B, C
Q.32 · CS · 1 mark · NAT
Show answer
Answer: 3
Q.33 · CS · 1 mark · NAT
Show answer
Answer: 11
Q.34 · CS · 1 mark · NAT
Show answer
Answer: 9
Q.35 · CS · 1 mark · NAT
Show answer
Answer: 6
Q.36 · CS · 2 marks · MCQ
Show answer
Answer: C
Q.37 · CS · 2 marks · MCQ
Show answer
Answer: B
Q.38 · CS · 2 marks · MCQ
Show answer
Answer: A
Q.39 · CS · 2 marks · MCQ
Show answer
Answer: B
Q.40 · CS · 2 marks · MCQ
Show answer
Answer: D
Q.41 · CS · 2 marks · MCQ
Show answer
Answer: A
Q.42 · CS · 2 marks · MCQ
Show answer
Answer: D
Q.43 · CS · 2 marks · MCQ
Show answer
Answer: B
Q.44 · CS · 2 marks · MCQ
Show answer
Answer: B
Q.45 · CS · 2 marks · MCQ
Show answer
Answer: B
Q.46 · CS · 2 marks · MSQ
Show answer
Answer: A, C, D
Q.47 · CS · 2 marks · MSQ
Show answer
Answer: A
Q.48 · CS · 2 marks · MSQ
Show answer
Answer: B, D
Q.49 · CS · 2 marks · MSQ
Show answer
Answer: A, D
Q.50 · CS · 2 marks · MSQ
Show answer
Answer: B, D
Q.51 · CS · 2 marks · MSQ
Show answer
Answer: C
Q.52 · CS · 2 marks · MSQ
Show answer
Answer: B, D
Q.53 · CS · 2 marks · MSQ
Show answer
Answer: A, B, D
Q.54 · CS · 2 marks · MSQ
Show answer
Answer: B, C
Q.55 · CS · 2 marks · MSQ
Show answer
Answer: B, C
Q.56 · CS · 2 marks · MSQ
Show answer
Answer: A, B, C
Q.57 · CS · 2 marks · NAT
Show answer
Answer: 34
Q.58 · CS · 2 marks · NAT
Show answer
Answer: 4.24 to 4.26
Q.59 · CS · 2 marks · NAT
Show answer
Answer: 77.3
Q.60 · CS · 2 marks · NAT
Show answer
Answer: 95
Q.61 · CS · 2 marks · NAT
Show answer
Answer: 65536
Q.62 · CS · 2 marks · NAT
Show answer
Answer: 7
Q.63 · CS · 2 marks · NAT
Show answer
Answer: 4
Q.64 · CS · 2 marks · NAT
Show answer
Answer: 9.5
Q.65 · CS · 2 marks · NAT
Show answer
Answer: 6
GATE 2026 CS official answer key
From the official GATE answer key ↗. Numerical answers are accepted anywhere in the range shown.
| Q. | Section | Type | Marks | Answer |
|---|---|---|---|---|
| 1 | GA | MCQ | 1 | B |
| 2 | GA | MCQ | 1 | C |
| 3 | GA | MCQ | 1 | C |
| 4 | GA | MCQ | 1 | D |
| 5 | GA | MCQ | 1 | C |
| 6 | GA | MCQ | 2 | B |
| 7 | GA | MCQ | 2 | D |
| 8 | GA | MCQ | 2 | A |
| 9 | GA | MCQ | 2 | A |
| 10 | GA | MCQ | 2 | C |
| 11 | CS | MCQ | 1 | B |
| 12 | CS | MCQ | 1 | A |
| 13 | CS | MCQ | 1 | A |
| 14 | CS | MCQ | 1 | B |
| 15 | CS | MCQ | 1 | D |
| 16 | CS | MCQ | 1 | B |
| 17 | CS | MCQ | 1 | A |
| 18 | CS | MCQ | 1 | D |
| 19 | CS | MSQ | 1 | A, C, D |
| 20 | CS | MSQ | 1 | B, D |
| 21 | CS | MSQ | 1 | A, C |
| 22 | CS | MSQ | 1 | B, C |
| 23 | CS | MSQ | 1 | B, C |
| 24 | CS | MSQ | 1 | C |
| 25 | CS | MSQ | 1 | A, B, C |
| 26 | CS | MSQ | 1 | B, D |
| 27 | CS | MSQ | 1 | C |
| 28 | CS | MSQ | 1 | C |
| 29 | CS | MSQ | 1 | A, C |
| 30 | CS | MSQ | 1 | C, D |
| 31 | CS | MSQ | 1 | A, B, C |
| 32 | CS | NAT | 1 | 3 |
| 33 | CS | NAT | 1 | 11 |
| 34 | CS | NAT | 1 | 9 |
| 35 | CS | NAT | 1 | 6 |
| 36 | CS | MCQ | 2 | C |
| 37 | CS | MCQ | 2 | B |
| 38 | CS | MCQ | 2 | A |
| 39 | CS | MCQ | 2 | B |
| 40 | CS | MCQ | 2 | D |
| 41 | CS | MCQ | 2 | A |
| 42 | CS | MCQ | 2 | D |
| 43 | CS | MCQ | 2 | B |
| 44 | CS | MCQ | 2 | B |
| 45 | CS | MCQ | 2 | B |
| 46 | CS | MSQ | 2 | A, C, D |
| 47 | CS | MSQ | 2 | A |
| 48 | CS | MSQ | 2 | B, D |
| 49 | CS | MSQ | 2 | A, D |
| 50 | CS | MSQ | 2 | B, D |
| 51 | CS | MSQ | 2 | C |
| 52 | CS | MSQ | 2 | B, D |
| 53 | CS | MSQ | 2 | A, B, D |
| 54 | CS | MSQ | 2 | B, C |
| 55 | CS | MSQ | 2 | B, C |
| 56 | CS | MSQ | 2 | A, B, C |
| 57 | CS | NAT | 2 | 34 |
| 58 | CS | NAT | 2 | 4.24 to 4.26 |
| 59 | CS | NAT | 2 | 77.3 |
| 60 | CS | NAT | 2 | 95 |
| 61 | CS | NAT | 2 | 65536 |
| 62 | CS | NAT | 2 | 7 |
| 63 | CS | NAT | 2 | 4 |
| 64 | CS | NAT | 2 | 9.5 |
| 65 | CS | NAT | 2 | 6 |
Practise this paper with a timer
On Student AI Hub, GATE previous year papers are free: answer on screen, get instant checking with the official key and see your score. No AI credits used.