Science & Technology PYQs

Tap an option to check it. For one question at a time, use Start practice above.

1. Prelims 2026Q44IT & Communication

   Which of the following statements about DHRUV64 is/are correct ?

   1.It is the third chip fabricated under the DIR-V Programme with an overall aim to enable the creation of microprocessors for India.

   2.It is India’s first homegrown 1·0 GHz, 64-bit dual-core microprocessor.

   Select the answer using the code given below :

   a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
2. Prelims 2026Q45Defence & Nuclear Technology

   The Bureau of Indian Standard (BIS) recently introduced a national standard to test and assess bomb disposal system. Which of the following statements with regard to this system is/are correct ?

   1.The new standard is known as IS 19445 : 2025.

   2.It will improve interoperability of equipment across agencies.

   3.It was developed by TBRL, DRDO in collaboration with the 30th Central Scientific Research Institute, Russia.

   Select the answer using the code given below :

   a1, 2 and 3b2 and 3 onlyc1 and 2 onlyd1 only
3. Prelims 2026Q49Inventions & Scientists

   Which of the following statements with regard to India’s indigenous new high resolution weather model, the ‘Bharat Forecast System,’ is/are correct ?

   1.Its objective is to generate forecasts at the Panchayats cluster level.

   2.It was developed by IIT Delhi.

   Select the answer using the code given below :

   a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
4. Prelims 2026Q51Emerging TechnologiesAnswer disputed

   Which of the following statements regarding the features of blockchain technology are correct ?

   1.Records stored in the database may be made visible to relevant stakeholders without risk of alteration.

   2.Copies of the entire database are stored on multiple computers on a network, syncing within seconds.

   3.Consortium blockchain is a blend of public and private blockchains allowing selective data access.

   4.Mathematical algorithms make it impossible to change or delete any data once recorded and accepted.

   Select the answer using the code given below :

   a1 and 3b2 and 4 onlyc1, 2 and 4d1 and 4 only
5. Prelims 2026Q66Biotechnology

   Which of the following statements with regard to genetic medicine is/are correct ?

   1.Genetic medicines correct/compensate for the faulty genes responsible for disease.

   2.Engineered viruses and lipid nanoparticles are used as carriers of the genetic medicine.

   3.Genetic medicines alter the entire DNA sequence.

   Select the answer using the code given below :

   a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
6. Prelims 2026Q67Emerging Technologies

   Which of the following statements with regard to Large Language Models (LLMs) used in machine learning is/are correct ?

   1.LLMs assign probabilities to the next possible words and then pick the one with the highest probability.

   2.LLMs process data through mathematical optimization to minimise prediction errors.

   3.LLMs produce unbiased outputs.

   Select the answer using the code given below :

   a1 onlyb1 and 2 onlyc2 and 3 onlyd1, 2 and 3
7. Prelims 2026Q68Defence & Nuclear Technology

   Which of the following statements with regard to stealth technology is/are correct ?

   1.Stealth objects have a very small radar cross-section and are coated with Radar Absorbing Material.

   2.Stealth objects can be detected using specific frequencies.

   3.Stealth objects are coated with metamaterials to increase the scattering of electromagnetic radiation.

   Select the answer using the code given below :

   a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
8. Prelims 2026Q69IT & Communication

   Which of the following statements with regard to Black Boxes used in modern aircrafts is/are correct ?

   1.They carry a beacon emitting red light pulses to facilitate underwater detection.

   2.They record both the cockpit voice and flight data.

   3.Their memory units are made using either stainless steel or titanium.

   Select the answer using the code given below :

   a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
9. Prelims 2026Q71Space TechnologyAnswer disputed

   Consider the following statements with regard to involvement of private entities in India’s space programme :

   1.The Indian National Space Promotion and Authorisation Centre (IN-SPACe) is an autonomous agency formed to facilitate participation of private entities.

   2.Agnikul Cosmos launched the world’s first flight using 3D-printed rocket engine.

   3.Skyroot Aerospace has developed liquid fuel for GSLV.

   Which of the statements given above is/are correct ?

   a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
10. Prelims 2026Q72Defence & Nuclear Technology

    Which of the following statements with regard to drone swarms is/are correct ?

    1.They use Terahertz band of frequency to communicate with the command centre.

    2.Individual drones in the swarm can communicate with other drones in the swarm.

    3.GPS Spoofing is a commonly used technique to counter drone swarm attack.

    Select the answer using the code given below :

    a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
11. Prelims 2026Q73Biotechnology

    Which of the following statements with regard to GenomeIndia Project is/are correct ?

    1.It is a part of the Human Genome Project.

    2.The project is funded by the Department of Biotechnology (DBT), Government of India.

    3.Its primary aim is to build a catalogue of genetic diversity of the Indian population.

    Select the answer using the code given below :

    a1 onlyb2 and 3 onlyc1 and 2 onlyd1, 2 and 3
12. Prelims 2026Q74Emerging Technologies

    Which of the following statements with regard to the National Quantum Mission (NQM) is/are correct ?

    1.It aims at developing intermediate-scale quantum computers with 50 – 1000 physical qubits.

    2.Its implementation includes setting up of four Thematic Hubs (T-Hubs) in academic and national R&D institutes across India.

    Select the answer using the code given below :

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
13. Prelims 2026Q85Defence & Nuclear Technology

    Consider the following statements about Mission Sudarshan Chakra of India :

    1.It aims to enhance India’s air defence, ballistic missile defence and aerial offensive capabilities.

    2.This Mission is being designed to enhance rapid, precise, and powerful defence responses, reinforcing India’s strategic autonomy.

    3.One of the aims of this Mission is to cover all public places of India by an expanded nationwide security shield by 2035.

    Which of the statements given above is/are correct ?

    a1, 2 and 3b1 and 2 onlyc2 and 3 onlyd1 only
14. Prelims 2026Q93Defence & Nuclear Technology

    Which of the following items of defence hardware is/are manufactured in India ?

    1.Su-30 MKI Fighter Jets

    2.T-90 MK-III Tanks

    3.Akula Class Submarine

    Select the answer using the code given below :

    a1 and 2b1 and 3c1 onlyd2 only
15. Prelims 2025Q39Biology & Human Body

    Consider the following pairs :

    Plant : Description

    I.Cassava : Woody shrub

    II.Ginger : Herb with pseudostem

    III.Malabar spinach : Herbaceous climber

    IV.Mint : Annual shrub

    V.Papaya : Woody shrub

    How many of the above pairs are correctly matched?

    aOnly twobOnly threecOnly fourdAll the five
16. Prelims 2025Q42Emerging Technologies

    With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements :

    I.All types of UAVs can do vertical landing.

    II.All types of UAVs can do automated hovering.

    III.All types of UAVs can use battery only as a source of power supply.

    How many of the statements given above are correct?

    aOnly onebOnly twocAll the threedNone
17. Prelims 2025Q43Emerging Technologies

    In the context of electric vehicle batteries, consider the following elements :

    I.Cobalt

    II.Graphite

    III.Lithium

    IV.Nickel

    How many of the above usually make up battery cathodes?

    aOnly onebOnly twocOnly threedAll the four
18. Prelims 2025Q45ChemistryAnswer disputed

    Consider the following substances :

    I.Ethanol

    II.Nitroglycerine

    III.Urea Coal gasification technology can be used in the production of how many of them?

    aOnly onebOnly twocAll the threedNone
19. Prelims 2025Q46Defence & Nuclear Technology

    What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which are sometimes talked about in media?

    aThese are alternatives to hydrofluorocarbon refrigerantsbThese are explosives in military weaponscThese are high-energy fuels for cruise missilesdThese are fuels for rocket propulsion
20. Prelims 2025Q47Emerging Technologies

    Consider the following statements :

    I.It is expected that Majorana 1 chip will enable quantum computing.

    II.Majorana 1 chip has been introduced by Amazon Web Services (AWS).

    III.Deep learning is a subset of machine learning.

    Which of the statements given above are correct?

    aI and II onlybII and III onlycI and III onlydI, II and III