Science & Technology PYQs

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1. Prelims 2023Q56Space Technology

   Consider the following pairs :

   Objects in space : Description

   1.Cepheids : Giant clouds of dust and gas in space

   2.Nebulae : Stars which brighten and dim periodically

   3.Pulsars : Neutron stars that are formed when massive stars run out of fuel and collapse

   How many of the above pairs are correctly matched?

   aOnly onebOnly twocAll threedNone
2. Prelims 2023Q57Space Technology

   Which one of the following countries has its own Satellite Navigation System?

   aAustraliabCanadacIsraeldJapan
3. Prelims 2023Q58Defence & Nuclear Technology

   Consider the following statements :

   1.Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight.

   2.Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

   Which of the statements given above is/are correct?

   a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
4. Prelims 2023Q67Health & Diseases

   ‘Wolbachia method’ is sometimes talked about with reference to which one of the following?

   aControlling the viral diseases spread by mosquitoesbConverting crop residues into packing materialcProducing biodegradable plasticsdProducing biochar from thermo-chemical conversion of biomass
5. Prelims 2023Q69Biotechnology

   ‘Aerial metagenomics’ best refers to which one of the following situations?

   aCollecting DNA samples from air in a habitat at one gobUnderstanding the genetic makeup of avian species of a habitatcUsing air-borne devices to collect blood samples from moving animalsdSending drones to inaccessible areas to collect plant and animal samples from land surfaces and water bodies
6. Prelims 2023Q70Biotechnology

   ‘Microsatellite DNA’ is used in the case of which one of the following?

   aStudying the evolutionary relationships among various species of faunabStimulating ‘stem cells’ to transform into diverse functional tissuescPromoting clonal propagation of horticultural plantsdAssessing the efficacy of drugs by conducting series of drug trials in a population
7. Prelims 2022Q31IT & Communication

   Consider the following :

   1.Aarogya Setu

   2.CoWIN

   3.DigiLocker

   4.DIKSHA

   Which of the above are built on top of open-source digital platforms ?

   a1 and 2 onlyb2, 3 and 4 onlyc1, 3 and 4 onlyd1, 2, 3 and 4
8. Prelims 2022Q32IT & Communication

   With reference to Web 3·0, consider the following statements :

   1.Web 3·0 technology enables people to control their own data.

   2.In Web 3·0 world, there can be blockchain based social networks.

   3.Web 3·0 is operated by users collectively rather than a corporation.

   Which of the statements given above are correct ?

   a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
9. Prelims 2022Q33IT & Communication

   With reference to “Software as a Service (SaaS)”, consider the following statements :

   1.SaaS buyers can customise the user interface and can change data fields.

   2.SaaS users can access their data through their mobile devices.

   3.Outlook, Hotmail and Yahoo! Mail are forms of SaaS.

   Which of the statements given above are correct ?

   a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
10. Prelims 2022Q34Defence & Nuclear Technology

    Which one of the following statements best reflects the idea behind the “Fractional Orbital Bombardment System” often talked about in media ?

    aA hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.bA spacecraft lands on another planet after making several orbital motions.cA missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.dA spacecraft moves along a comet with the same speed and places a probe on its surface.
11. Prelims 2022Q35Emerging Technologies

    Which one of the following is the context in which the term “qubit” is mentioned ?

    aCloud ServicesbQuantum ComputingcVisible Light Communication TechnologiesdWireless Communication Technologies
12. Prelims 2022Q36IT & Communication

    Consider the following communication technologies :

    1.Closed-circuit Television

    2.Radio Frequency Identification

    3.Wireless Local Area Network

    Which of the above are considered Short-Range devices/technologies ?

    a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
13. Prelims 2022Q37Health & Diseases

    Consider the following statements :

    1.Biofilms can form on medical implants within human tissues.

    2.Biofilms can form on food and food processing surfaces.

    3.Biofilms can exhibit antibiotic resistance.

    Which of the statements given above are correct ?

    a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
14. Prelims 2022Q38Health & Diseases

    Consider the following statements in respect of probiotics :

    1.Probiotics are made of both bacteria and yeast.

    2.The organisms in probiotics are found in foods we ingest but they do not naturally occur in our gut.

    3.Probiotics help in the digestion of milk sugars.

    Which of the statements given above is/are correct ?

    a1 onlyb2 onlyc1 and 3d2 and 3
15. Prelims 2022Q39Health & Diseases

    In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements :

    1.The Serum Institute of India produced COVID-19 vaccine named Covishield using mRNA platform.

    2.Sputnik V vaccine is manufactured using vector based platform.

    3.COVAXIN is an inactivated pathogen based vaccine.

    Which of the statements given above are correct ?

    a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
16. Prelims 2022Q40Space Technology

    If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth ?

    1.GPS and navigation systems could fail.

    2.Tsunamis could occur at equatorial regions.

    3.Power grids could be damaged.

    4.Intense auroras could occur over much of the Earth.

    5.Forest fires could take place over much of the planet.

    6.Orbits of the satellites could be disturbed.

    7.Shortwave radio communication of the aircraft flying over polar regions could be interrupted.

    Select the correct answer using the code given below :

    a1, 2, 4 and 5 onlyb2, 3, 5, 6 and 7 onlyc1, 3, 4, 6 and 7 onlyd1, 2, 3, 4, 5, 6 and 7
17. Prelims 2022Q48Biology & Human Body

    Which of the following are nitrogen-fixing plants ?

    1.Alfalfa

    2.Amaranth

    3.Chickpea

    4.Clover

    5.Purslane (Kulfa)

    6.Spinach

    Select the correct answer using the code given below :

    a1, 3 and 4 onlyb1, 3, 5 and 6 onlyc2, 4, 5 and 6 onlyd1, 2, 4, 5 and 6
18. Prelims 2022Q69Emerging Technologies

    With reference to Non-Fungible Tokens (NFTs), consider the following statements :

    1.They enable the digital representation of physical assets.

    2.They are unique cryptographic tokens that exist on a blockchain.

    3.They can be traded or exchanged at equivalency and therefore can be used as a medium of commercial transactions.

    Which of the statements given above are correct ?

    a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
19. Prelims 2022Q97Biology & Human Body

    Which one of the following statements best describes the role of B cells and T cells in the human body ?

    aThey protect the body from environmental allergens.bThey alleviate the body’s pain and inflammation.cThey act as immunosuppressants in the body.dThey protect the body from the diseases caused by pathogens.
20. Prelims 2022Q98Emerging Technologies

    Consider the following statements :

    1.Other than those made by humans, nanoparticles do not exist in nature.

    2.Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.

    3.Nanoparticles of some commercial products which enter the environment are unsafe for humans.

    Which of the statements given above is/are correct ?

    a1 onlyb3 onlyc1 and 2d2 and 3