GATE CSE & IT: 40 Years of Patterns
Data analysis of every GATE CSE & ITquestion 1987-2026. What's tested year after year, what shifted, what to focus on.
Top 20 most-tested topics
Sorted by total question count. The "appeared in" column shows recurrence — topics in 30+ different years are near-guarantees for the next exam.
| Topic | Total Qs | Years appeared | First → Last | Recurrence |
|---|---|---|---|---|
| Data Structures | 215 | 35 | 1987 → 2026 | 88% |
| Set Theory & Logic | 106 | 35 | 1990 → 2026 | 88% |
| Probability & Counting | 102 | 33 | 1994 → 2026 | 83% |
| Complexity Theory | 99 | 36 | 1987 → 2026 | 90% |
| Linear Algebra | 93 | 33 | 1987 → 2026 | 83% |
| Regular Languages | 83 | 33 | 1987 → 2026 | 83% |
| Graph Theory | 78 | 29 | 1990 → 2026 | 73% |
| Algebraic Structures | 74 | 30 | 1987 → 2026 | 75% |
| Calculus | 62 | 29 | 1993 → 2026 | 73% |
| Context-Free Languages | 61 | 34 | 1987 → 2026 | 85% |
| Combinatorics | 60 | 26 | 1987 → 2025 | 65% |
| Graph Algorithms | 59 | 29 | 1990 → 2026 | 73% |
| Normalization | 55 | 27 | 1994 → 2026 | 68% |
| Network Layer | 53 | 21 | 2003 → 2026 | 53% |
| Parsing | 51 | 23 | 1988 → 2026 | 57% |
| Turing Machines & Computability | 50 | 27 | 1989 → 2026 | 68% |
| Boolean Algebra | 50 | 21 | 1990 → 2026 | 53% |
| Memory Hierarchy & Cache | 48 | 24 | 1990 → 2025 | 60% |
| Number Representation | 47 | 26 | 1990 → 2026 | 65% |
| Memory Management | 43 | 24 | 1990 → 2026 | 60% |
Recurrence ≥ 80% means the topic appears in at least 32 of 40 years — functionally guaranteed.
The NAT shift: 0% → 28%
2010-2013
0%
NAT share (pre-shift era)
2014-2020
34%
NAT introduced
2021-2026
25%
NAT entrenched
Numerical Answer Type (NAT) questions did not exist in GATE CSE & IT before 2014. Today they make up roughly a quarter of every paper. Aspirants studying from pre-2014 textbooks are training for an exam that no longer exists.
Question type mix by year
| Year | MCQ | NAT | MSQ/MTF | % NAT |
|---|---|---|---|---|
| 2026 | 57 | 28 | 25 | 24% |
| 2025 | 140 | 67 | 27 | 28% |
| 2024 | 154 | 58 | 31 | 23% |
| 2023 | 24 | 14 | 15 | 26% |
| 2022 | 27 | 15 | 11 | 28% |
| 2021 | 59 | 28 | 21 | 25% |
| 2020 | 28 | 22 | 0 | 39% |
| 2019 | 36 | 19 | 0 | 33% |
| 2018 | 35 | 18 | 1 | 32% |
| 2017 | 60 | 21 | 4 | 23% |
| 2016 | 65 | 45 | 1 | 39% |
| 2015 | 96 | 49 | 4 | 31% |
| 2014 | 86 | 53 | 1 | 37% |
| 2013 | 44 | 0 | 0 | 0% |
Why this matters
- Data Structures has appeared in 35different years. That's a near-guarantee, not a probability.
- 5 sub-topics under Discrete Mathematicsall appear 80%+ years. Treating Discrete Math as one chapter is a mistake — it's 5 separate guaranteed topics.
- NAT now ≈ 30% of paper. Anyone preparing only MCQs is losing 30 marks before they walk in.
- General Aptitude grew 10× — from 10 Qs (2010-2015) to 107 Qs (2021-2026). Coaching books that ignore GA are obsolete.
- Topics absent for 5+ years tend to return.Spectrum of what's overdue: —