The GATE Machine — Pattern, the Three Question Types, and the Score
GATE is 65 questions, 100 marks, 180 minutes, and it is not one exam but a set of separate discipline papers: you sit the paper for your own discipline, and up to two papers from a prescribed set of combinations. There are thirty of them. GATE 2027 adds Robotics & Automation and, in the same revision, folds Textile Engineering & Fibre Science into Engineering Sciences as its section XE9 — one paper in, one out — which is exactly why this chapter counts marks rather than papers. What every one of them shares is General Aptitude — 10 questions for 15 marks — and, in most engineering papers, Engineering Mathematics for 13 marks. Those 28 marks are the same work whichever paper you sit, and they are where a course like this one can help you; the remaining 72 belong to your discipline. Read this chapter before any of that, because the single most valuable thing to know about GATE is not in its syllabus: only the multiple-choice questions carry negative marking. A wrong MCQ costs a third of a mark on a 1-mark question and two-thirds on a 2-mark one, while MSQ and NAT questions cost nothing at all when wrong. That asymmetry decides what you attempt, in what order, and what you do with the last twenty minutes — and it is the part candidates most often discover after the exam rather than before it. It also has an exact consequence worth working out rather than guessing at: because the penalty is precisely one third of the question's value, a blind guess between four options is priced at exactly zero, and every option you can eliminate makes the guess strictly worth taking.
Three Question Types, and Only One of Them Punishes You
| Type | How you answer | Wrong answer costs |
|---|---|---|
| MCQ — multiple choice | Four options, exactly one correct. You click one. | −1/3 mark on a 1-mark question, −2/3 on a 2-mark question. No partial credit. |
| MSQ — multiple select | One or more options are correct, and you must mark all of them and nothing else. | Nothing. No negative marking, and generally no partial credit either — so an incomplete selection scores zero, not half. |
| NAT — numerical answer | No options at all. You type a number with the on-screen keypad. | Nothing. No negative marking. |
🧠 What the asymmetry means in the exam hall
On an MSQ or a NAT question, never leave the box empty. A wrong answer and a blank score exactly the same — zero — so any attempt is free, and a half-finished computation is worth submitting. On an MCQ, work the expected value rather than trusting a rule of thumb. The penalty is a third of the question's value and there are three wrong options, so a blind four-option guess comes to exactly (1/4 × 1) + (3/4 × −1/3) = 0 — break-even, not harmful, and the same at both mark values. Eliminate one option and it becomes +1/9 of a mark; eliminate two and it is +1/3. So the folk rule "never guess on GATE" is wrong: guessing is free at worst, and profitable the moment you can rule anything out. That is the whole of GATE attempt strategy, and it is arithmetic rather than nerve.Marks, Normalisation and the Score
Your marks out of 100 are not your GATE score. A paper sat by a large number of candidates runs in more than one session, and two sessions of the same paper are never exactly equally difficult, so marks are normalised across sessions before the score is computed. The consequence to internalise is the one candidates get wrong: your score depends on how the whole cohort performed, not only on your own answers, so comparing your raw marks with a friend who sat a different session tells you very little.
- A GATE score is valid for three years from the date it is declared, so one good attempt covers three admission cycles and three recruitment seasons.
- It is used for two quite different things: M.Tech / ME / PhD admission, through COAP and institute counselling, and recruitment by public sector undertakings, many of which publish their own GATE cutoffs.
- Eligibility now reaches the third year of a three-year undergraduate degree, so a candidate can sit GATE before finishing, and use the three-year validity to apply after.
- Up to two papers may be taken, but only in the combinations the organising institute prescribes — the pairs are published each year and are not free choice.
🎯 Why this chapter gives no dates
GATE is organised by IISc Bengaluru and the seven older IITs in rotation, one of them each year, and the official portal moves with it — a new institute, a new domain, every cycle. So the application window, the fee, the permitted paper combinations and the exam dates all live at an address that changes annually, and this chapter names none of them. That is not caution for its own sake: an earlier draft of this very note printed one cycle's institute and URL as the current ones, and it was a cycle out of date within months, reading as authoritative while being wrong — which is worse than absent. The live portal is the link under this programme's official sources, which is kept in one place for exactly this reason. Treat everything in this chapter as the structure that persists between cycles.Key takeaways
- 65 questions, 100 marks, 180 minutes. General Aptitude is 10 questions for 15 marks in every paper; the chosen paper is 55 questions for 85.
- Only MCQs carry negative marking: −1/3 on a 1-mark question, −2/3 on a 2-mark one. MSQ and NAT cost nothing when wrong.
- So never leave an MSQ or a NAT blank — a wrong answer and a blank both score zero. And because the MCQ penalty is exactly a third of the question’s value, a blind four-option guess is exactly break-even at both mark values: +1/9 of a mark with one option eliminated, +1/3 with two. Guessing is free at worst.
- An MSQ needs every correct option and no incorrect one, and generally carries no partial credit — an incomplete selection scores zero, not half.
- General Aptitude plus Engineering Mathematics is about 28 of the 100 marks, from two small syllabuses that do not change with your discipline. That is the best marks-per-page in the paper.
- Marks are normalised across sessions, so your score reflects the cohort as well as your answers. The score is valid three years and is used both for PG admission and for PSU recruitment.
Practice questions (8)
Attempt each one before opening the answer. Every explanation names the tempting wrong option as well as the right one, because that is where marks are lost.
In every GATE paper, the General Aptitude section carries:
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Answer: A — 10 questions for 15 marks
GA is 10 questions for 15 marks — five of one mark and five of two, which is where the 15 comes from and why the question count and the mark count differ. It is identical in every paper, so it is the one section a GATE course can teach every candidate at once. The rest of the paper is 55 questions for 85 marks, and 10 + 55 = 65 questions, 15 + 85 = 100 marks.A candidate answers a 2-mark MCQ incorrectly. The marks deducted are:
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Answer: B — 2/3
The MCQ penalty is a third of the question's value: 1/3 on a 1-mark question and 2/3 on a 2-mark question. Option A is the 1-mark penalty, offered because candidates remember "one third" as a single rule and forget that it scales with the question. Option D is wrong for MCQs but right for the other two types — GATE has negative marking on MCQs only, and mixing that up in either direction is the costliest confusion in the paper.With five minutes left, a candidate has an unattempted NAT question and has done half the computation. The best move is to:
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Answer: B — Type the best number available, because a wrong NAT answer costs nothing
NAT questions carry no negative marking, so a wrong typed answer and an empty box score exactly the same: zero. Any number you can justify is therefore free to submit, and a blank is a mark you decided not to have. Option A states the opposite of the rule and is the belief that costs candidates the most marks. Option C describes something the interface cannot do — a question's type is fixed. Option D invents a sectional cutoff; GATE has none, only an overall qualifying mark.An MSQ has four options, of which two are correct. A candidate marks one correct option and nothing else. The candidate scores:
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Answer: C — Zero, but with no penalty
An MSQ requires every correct option and no incorrect one, and generally carries no partial credit — so marking one of two correct answers scores zero. But MSQs also carry no negative marking, so the attempt costs nothing beyond the marks not earned. That combination is what makes MSQs the most dangerous question type in the paper: they punish half-knowledge with a zero while feeling like progress, and the defence is to mark an MSQ only when you can say something definite about each of the four options.Why are GATE marks normalised before the score is computed?
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Answer: B — Because a paper sat in more than one session cannot have two sessions of exactly equal difficulty
A paper with many candidates runs in multiple sessions, and no two question papers are exactly equally hard, so raw marks from different sessions are not comparable. Normalisation removes that session effect before the score is computed. Option A is wrong on the facts — every paper has 65 questions for 100 marks. Option C confuses the score with a percentile, which GATE also reports but which is a different quantity. Option D is wrong because negative marking is applied to the raw marks, not afterwards.A GATE score is valid for:
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Answer: C — Three years
Three years from the date the result is declared. This changes how the exam should be planned rather than merely being a fact to recall: one strong attempt covers three admission cycles and three PSU recruitment seasons, so a candidate in the third year of a three-year degree can sit GATE before finishing and still use the score after graduating. The three-year window is also why a marginal score is worth improving on rather than abandoning.Which statement about taking two GATE papers is correct?
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Answer: B — A candidate may take up to two papers, but only in combinations the organising institute prescribes
Two papers are allowed, but from a prescribed set of combinations published each year — the pairs are chosen so that the two papers do not clash in the exam schedule and are related enough to be a realistic double attempt. Option A is the common misreading: "up to two papers" is not "any two". Option C describes the rule before two-paper attempts were introduced, and option D adds an eligibility condition that does not exist. Since the permitted pairs are republished annually, check the current organising institute's portal rather than a list from a previous year.A candidate has narrowed a 1-mark MCQ down to two options and cannot decide between them. Guessing:
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Answer: B — Has positive expected value, so the question should be answered
With two live options the chance of being right is 1/2. The expected value of a guess is (1/2 × +1) + (1/2 × −1/3) = 1/2 − 1/6 = +1/3 of a mark, which is positive, so the question should be answered. The break-even point is three live options: (1/3 × 1) + (2/3 × −1/3) = 1/3 − 2/9 = +1/9, still slightly positive; with all four live it is (1/4 × 1) + (3/4 × −1/3) = 0, exactly break-even. So a blind four-option guess on a 1-mark MCQ is neutral rather than harmful, and every option you eliminate makes the guess strictly better — which is a more useful thing to know than the folk rule "never guess".