PYQUPSC
Civil Services Prep
Prelims•UPSC Civil Services Examination

Science & Technology

Explore previous year questions, practice with self-assessments, and review explanations.

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2026Digital Technology
Question 1

What does two-factor authentication improve?

4 options
2026Space Technology
Question 2

Green hydrogen is generally produced using renewable electricity to do what?

4 options
2026Biotechnology
Question 3

A quantum computer uses which basic information unit?

4 options
2026Health Technology
Question 4

Antimicrobial resistance is a concern because microbes can become what?

4 options
2026Space Technology
Question 5

Which instrument is used to detect earthquakes by recording ground motion?

4 options
2025Digital Technology
Question 6

Carbon capture and storage aims to capture carbon dioxide and then do what?

4 options
2024Energy Technology
Question 7

Which technology is central to modern satellite navigation systems?

4 options
2024Energy Technology
Question 8

Lithium-ion batteries store and release energy through movement of what?

4 options
2024Biotechnology
Question 9

What does 5G refer to?

4 options
2024Health Technology
Question 10

Which technology can help detect patterns in large medical images?

4 options
2023Digital Technology
Question 11

Which of these is a common use of remote sensing?

4 options
2023Digital Technology
Question 12

Which Indian mission is associated with a soft landing near the Moon's south polar region in 2023?

4 options
2022Biotechnology
Question 13

CRISPR-Cas systems are widely known for which application?

4 options
2021Space Technology
Question 14

A geostationary satellite appears stationary relative to which reference?

4 options
2021Health Technology
Question 15

mRNA vaccines work by providing cells with instructions to make what?

4 options
2021Energy Technology
Question 16

What is the purpose of a vaccine in public health?

4 options
2021Energy Technology
Question 17

A heat pump is efficient because it primarily does what?

4 options
2020Space Technology
Question 18

Blockchain is best described as what?

4 options
2020Biotechnology
Question 19

What is the main goal of a semiconductor chip's transistor?

4 options
2020Health Technology
Question 20

A large language model primarily learns statistical patterns from what?

4 options