GATE CS Previous Year Questions & Study Resources
GATE Computer Science and Information Technology (CS)
1,495 solved GATE CS questions from 2014–2026, each with the official answer and a step-by-step solution. Solving past papers is the highest-signal preparation there is: it teaches the real difficulty level, the recurring topics, and the time pressure of the actual exam.
Recent papers
GATE CS subject-wise PYQs
Choose a subject to revise one area at a time. Subject tags can overlap; these question counts are not marks weightage.
Continue learning with Success Tracker
Build on your GATE CS PYQ revision
Reading a solution is a useful start. In Success Tracker, you can attempt questions yourself, review mistakes and return to the topics that need another pass.
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
Learn the concept, then solve the PYQs
Start with the available GATE CS revision companions: Engineering Mathematics, General Aptitude, Programming & Data Structures, Computer Networks, Computer Organization & Architecture, Theory of Computation, Operating System, Databases, Algorithms, Digital Logic, Compiler Design. Each combines concept notes, mistakes to avoid, an original worked example, a self-check and free further reading with the subject’s PYQs. No account is needed to read them.
Engineering Mathematics: check hypotheses before applying a theorem
State the domain, continuity, or convergence condition a formula requires before substituting. These selected foundations connect calculus, linear algebra, probability, and discrete mathematics as they appear in the GATE CS syllabus. Each topic needs its own deeper study.
Read notes and solve questionsGeneral Aptitude: read the claim, then test it
Separate what is stated from what is inferred. Verbal reasoning depends on the passage's own claims; quantitative reasoning depends on a stated relationship. These selected foundations connect reading comprehension, data interpretation, and basic arithmetic reasoning. They are not a substitute for broader practice.
Read notes and solve questionsProgramming & Data Structures: trace execution, then generalize
Simulate the code on small inputs before reasoning about general behavior. These selected foundations connect C-language constructs, pointers, recursion, and fundamental data structures. Each structure has insertion, deletion, and search costs that depend on its invariants.
Read notes and solve questionsComputer Networks: identify the layer, then apply its rules
Determine which protocol layer a question addresses before applying its mechanisms. These selected foundations connect the physical, data link, network, transport, and application layers. Protocol behavior depends on the specific mechanism's assumptions, not on generic layering claims.
Read notes and solve questionsComputer Organization: trace the datapath, then count the cycles
Identify the instruction format, datapath stages, and memory hierarchy parameters before computing execution time or hit rates. These selected foundations connect instruction sets, pipelining, caches, and I/O without replacing a full architecture course.
Read notes and solve questionsTheory of Computation: define the language, then choose the machine
Specify the set of strings a language contains before attempting to recognize or generate them. These selected foundations connect regular languages, context-free grammars, Turing machines, and undecidability. Formal proofs of non-regularity and undecidability follow structured techniques, not intuition.
Read notes and solve questionsOperating System: trace time, memory, and shared state
Draw the state an operating-system problem changes: a ready queue, page mapping, or shared variable. Keep units and policy assumptions visible. These selected foundations lead into a translation calculation and a separate scheduling check; use them to diagnose reasoning errors rather than as an exhaustive topic list.
Read notes and solve questionsDatabases: reason from dependencies, rows, and schedules
Connect database definitions to small, checkable calculations. Start with stated constraints, not a pattern remembered from another question. Record the schema, dependencies, duplicate semantics, or transaction order before choosing a rule. These selected revision notes are a starting point, not a complete syllabus.
Read notes and solve questionsAlgorithms: choose the invariant before the formula
Identify the input model, required output, and property that makes an algorithm correct before calculating time or space. These selected revision notes connect asymptotic analysis, graph traversal, and design techniques. Reproduce the small examples by hand, explaining each decision before moving to larger practice problems.
Read notes and solve questionsDigital Logic: trace values through gates and state
Separate combinational output (determined by present inputs) from sequential output (determined by present inputs and stored state). These selected foundations connect Boolean algebra, gate-level design, and finite-state machines. Verify each simplification by evaluating a few input combinations.
Read notes and solve questionsCompiler Design: follow the grammar through each translation phase
Trace how source text becomes tokens, parse trees, and intermediate code. These selected foundations connect lexical analysis, parsing, syntax-directed translation, and basic optimization. Each phase's output is the next phase's input; errors in one phase propagate forward.
Read notes and solve questionsA repeatable PYQ revision routine
- Attempt a question before reading its solution. Write down your assumptions and reasoning, not just the answer.
- Compare the reasoning. Classify a miss as a concept gap, a calculation error or a misread condition.
- Use the revision notes to repair the gap, then attempt a different question from the same subject.
- Reattempt the missed question later without the solution. Use a complete paper to check pacing after topic revision.
This is our suggested study workflow, not an official sequence or a prediction of the next paper. Read how we produce our content.
Browse by year
GATE CS 2026
130 questions · 2 papers
GATE CS 2025
130 questions · 2 papers
GATE CS 2024
130 questions · 2 papers
GATE CS 2023
65 questions · 1 paper
GATE CS 2022
65 questions · 1 paper
GATE CS 2021
130 questions · 2 papers
GATE CS 2020
65 questions · 1 paper
GATE CS 2019
65 questions · 1 paper
GATE CS 2018
65 questions · 1 paper
GATE CS 2017
130 questions · 2 papers
GATE CS 2016
130 questions · 2 papers
GATE CS 2015
195 questions · 3 papers
GATE CS 2014
195 questions · 3 papers
Guides & resources
GATE CSE 2027: Dates, Eligibility & Exam Pattern
GATE CSE 2027: GATE exam window 6–21 Feb 2027; paper slot unannounced. IIT Madras dates, eligibility, fees and marking rules. Dates liable to change.
Official syllabusGATE 2027 Registration: Process, Dates, Documents & Fees
GATE 2027 registration opens 2 September 2026 on GOAPS. Official process, DigiLocker requirement, documents, photo specs, fees and deadlines from IIT Madras.