GS Paper 1Science & TechnologyDifficultyStrategy

Science & Technology — fewer questions, harder questions, and what to actually cover

S&T has declined in volume but risen sharply in difficulty. The questions that remain test mechanisms and applications, not awareness. Here is what the data says to study and what to skip.

17 May 2026·5 min read·Vedadots Compass

Science & Technology is the subject most aspirants approach with anxiety and most coaching institutes approach with a "cover everything" strategy. The data suggests both responses are wrong. S&T has been declining in volume — and the questions that remain are harder and more specific than ever.

15%of GS Paper 1 2025 was Science & Technology — down from earlier years

The volume decline

| Year | S&T share | |------|-----------| | 2022 | 14% | | 2023 | 16% | | 2024 | 12% | | 2025 | 15% |

Science & Technology — question count, 2022–2025

S&T has declined in every year of the dataset. This is the clearest downward trend of any subject in GS Paper 1. The decline is not random — it reflects a deliberate shift in what UPSC considers worth testing.

Key insight

The correct response to a declining subject is not to ignore it — it is to study it more efficiently. S&T still produces 7–10 questions per year. Those marks are worth having. The right move is targeted preparation, not breadth.

But the questions that remain are harder

S&T question difficulty by year, 2022–2025

As volume has fallen, difficulty has risen. The Easy questions that characterised earlier S&T papers — "What is CRISPR?", "Which organisation manages ISRO?" — have largely disappeared. What remains tests whether an aspirant understands how a technology works, what its limitations are, or what policy implications it carries.

This is a harder cognitive task. Awareness alone no longer suffices.

The nature shift — more Hybrid, less Static

S&T questions by nature, 2022–2025

S&T has moved away from pure Static questions toward Hybrid. A question about a recent space mission does not simply ask "name the mission" — it tests the launch vehicle type, the scientific objective, or India's broader space policy framework. The current event is the hook; the static technical knowledge is what the question actually tests.

Strategy note

For every S&T current event you track, ask three questions: What does this technology actually do (mechanism)? What are its limitations or risks? What is the policy or governance framework around it? These three dimensions are what UPSC tests — not the name of the mission or the date of the launch.

The high-frequency sub-topics

S&T — top sub-topics by question count, all years

The areas that appear consistently

Space technology and ISRO missions — the most reliable S&T sub-topic. Questions test mission objectives, launch vehicle specifications, and India's space policy — not just mission names.
Biotechnology and genetics — CRISPR, gene editing, GMOs, biosafety frameworks. Questions increasingly test ethical and regulatory dimensions alongside the science.
Defence technology — missile systems, indigenisation, DRDO programmes. Often Hybrid with current defence procurement news as the hook.
Health technology and pharmaceuticals — vaccine platforms, drug regulation, health policy frameworks. Has grown post-pandemic.
Information technology and cybersecurity — AI governance, data protection frameworks, cyber law. Growing rapidly, especially Hybrid questions linking recent developments to the IT Act and related frameworks.
Nuclear technology — India's nuclear doctrine, civilian nuclear agreements, reactor types. Appears reliably but at low volume (1–2 per year).

The preparation approach

The "cover everything in S&T" strategy is wrong. It produces broad awareness of many technologies and deep knowledge of none — which is precisely the preparation profile that fails modern S&T questions, because those questions now test depth.

Strategy note

Prepare S&T in two tiers. Tier 1 (deep): space technology, biotechnology/ genetics, health technology, IT governance. These appear every year and at depth. For each sub-topic in Tier 1, know the mechanism, the limitations, the regulatory framework, and the current policy context. Tier 2 (light): defence technology, nuclear technology, and emerging areas like quantum computing. Know the basics and follow major developments, but don't go deeper than a one-page summary per area.

Strategy note

For S&T current affairs: one quality source is enough. PIB releases on technology, the DST annual report, and ISRO's official communications cover the vast majority of what appears in questions. Reading technology journalism widely adds volume without adding the precision that UPSC questions demand.

Data note

This analysis covers 2022–2025. S&T is the most volatile subject in terms of which specific topics appear — it closely tracks what has been in the news in the 12–18 months before the exam. The sub-topics and preparation approach above are based on four years of patterns; individual years will vary.