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Science & Technology GK Questions with Answers – Page 2

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Science & Technology multiple choice questions with answers and explanations, 20 per page, for SSC, Banking, UPSC, Railway and state exams.

502 questions

Science & Technology NotesOnly previous-year questions (128)GK Quiz
Q21.Science & TechnologyAsked in: CDS · CDS-II 2025, GKMedium

Which of the following statements about India's military arsenal is/are correct ? 1. HAMMER is a weapon system built for the Rafale fighter aircraft. 2. SCALP cruise missile is also known as Storm Shadow. 3. BrahMos missiles are built under a joint venture between India and Russia. Select the answer using the code given below :

  1. A.1 and 2 only
  2. B.2 and 3 only
  3. C.1, 2 and 3
  4. D.3 only
Show answer
Correct answer: C. 1, 2 and 3

All three statements describe the weapons correctly. HAMMER, short for Highly Agile Modular Munition Extended Range, is a French precision-guided air-to-ground bomb kit made by Safran; India bought it to arm its Rafale jets, which can strike targets tens of kilometres away with it.

Q22.Science & TechnologyAsked in: NDA · NDA-I 2025, GATEasy

India's Gas Turbine Research Establishment (GTRE), part of the Defence Research and Development Organisation (DRDO) has developed an aero-engine which will potentially make India self-reliance in aero-engine technology. What is the name of the engine?

  1. A.Ganga
  2. B.Yamuna
  3. C.Krishna
  4. D.Kaveri
Show answer
Correct answer: D. Kaveri

Kaveri is the turbofan aero-engine developed by the Gas Turbine Research Establishment of DRDO in Bengaluru. The Kaveri project began in the late 1980s to power the Light Combat Aircraft Tejas.

Q23.Science & TechnologyAsked in: CDS · CDS-I 2022, GKHard

Which one of the following statements is correct regarding LOFAR (Low Frequency Array)?

  1. A.It is the world's most powerful radio antenna.
  2. B.It is a space technology launched by NASA to discover exoplanets.
  3. C.It is an arrangement of satellites in space for the purpose of creating Satellite Navigation System.
  4. D.It is a wireless communication technology for 5G services.
Show answer
Correct answer: A. It is the world's most powerful radio antenna.

LOFAR, the Low Frequency Array, is a huge radio telescope network built by ASTRON in the Netherlands, described as the largest and most sensitive radio telescope working at low frequencies.

Q24.Science & TechnologyAsked in: CDS · CDS-II 2022, GKEasy

The terms 'Ethereum, Solana, Polkadot and Tether', sometimes mentioned in the news, refer to

  1. A.Cryptocurrencies
  2. B.Earth Observation Satellites
  3. C.Hypersonic Cruise Missiles
  4. D.Virtual Private Network service providers
Show answer
Correct answer: A. Cryptocurrencies

Ethereum, Solana, Polkadot and Tether are all names from the world of blockchain-based digital currencies. A cryptocurrency is a digital asset recorded on a blockchain, a shared ledger kept by many computers, and secured by cryptography rather than issued by a central bank.

Q25.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IEasy

What is Cas9 protein that is often mentioned in news?

  1. A.A molecular scissors used in targeted gene editing
  2. B.A biosensor used in the accurate detection of pathogens in patients
  3. C.A gene that makes plants pest-resistant
  4. D.A herbicidal substance synthesized in genetically modified crops
Show answer
Correct answer: A. A molecular scissors used in targeted gene editing

Cas9 is the enzyme in the CRISPR-Cas9 system that cuts DNA at a chosen spot, which is why it is called molecular scissors.

Q26.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IMedium

With reference to India's satellite launch vehicles, consider the following statements :

1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites.

2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth.

3. GSLV Mk III is a four-staged launch vehicle with the first and third stages using solid rocket motors; and the second and fourth stages using liquid rocket engines.

Which of the statements given above is/are correct ?

  1. A.1 only
  2. B.2 and 3
  3. C.1 and 2
  4. D.3 only
Show answer
Correct answer: A. 1 only

PSLV mainly carries Earth observation satellites to low orbits, GSLV was built for communication satellites, and the other two statements describe the rockets wrongly.

Q27.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IEasy

Recently, scientists observed the merger of giant 'blackholes' billions of light-years away from the Earth. What is the significance of this observation?

  1. A.'Higgs boson particles' were detected.
  2. B.'Gravitational waves' were detected.
  3. C.Possibility of inter-galactic space travel through 'wormhole' was confirmed.
  4. D.It enabled the scientists to understand 'singularity'.
Show answer
Correct answer: B. 'Gravitational waves' were detected.

The merger of two black holes sent out ripples in space-time, and catching those ripples was the first direct detection of gravitational waves.

Q28.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IHard

RNA interference (RNAi) technology has gained popularity in the last few years. Why?

1. It is used in developing gene silencing therapies.

2. It can be used in developing therapies for the treatment of cancer.

3. It can be used to develop hormone replacement therapies.

4. It can be used to produce crop plants that are resistant to viral pathogens.

Select the correct answer using the code given below.

  1. A.1, 2 and 4
  2. B.2 and 3
  3. C.1 and 3
  4. D.1 and 4 only
Show answer
Correct answer: A. 1, 2 and 4

RNA interference switches particular genes off, and every use in statements 1, 2 and 4 depends on switching a gene off.

Q29.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium

Consider the following statements :

DNA Barcoding can be a tool to :

1. assess the age of a plant or animal.

2. distinguish among species that look alike.

3. identify undesirable animal or plant materials in processed foods.

Which of the statements given above is/are correct?

  1. A.1 only
  2. B.3 only
  3. C.1 and 2
  4. D.2 and 3
Show answer
Correct answer: D. 2 and 3

DNA barcoding tells us which species a sample belongs to, not how old the organism is.

Q30.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium

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 ?

  1. A.1 only
  2. B.3 only
  3. C.1 and 2
  4. D.2 and 3
Show answer
Correct answer: D. 2 and 3

Metal-oxide nanoparticles are used in cosmetics and some nanoparticles released into the environment can harm people, but nanoparticles are not made only by humans.

Q31.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IMedium

"3D printing" has applications in which of the following?

1. Preparation of confectionery items

2. Manufacture of bionic ears

3. Automotive industry

4. Reconstructive surgeries

5. Data processing technologies

Select the correct answer using the code given below :

  1. A.1, 3 and 4 only
  2. B.2, 3 and 5 only
  3. C.1 and 4 only
  4. D.1, 2, 3, 4 and 5
Show answer
Correct answer: D. 1, 2, 3, 4 and 5

3D printing, or additive manufacturing, builds objects layer by layer from a digital design, and it is used in all five fields listed.

Q32.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IMedium

What is the purpose of 'evolved Laser Interferometer Space Antenna (eLISA)' project ?

  1. A.To detect neutrinos
  2. B.To detect gravitational waves
  3. C.To detect the effectiveness of missile defence system
  4. D.To study the effect of solar flares on our communication systems
Show answer
Correct answer: B. To detect gravitational waves

eLISA is a planned space observatory of the European Space Agency that will use laser interferometry between spacecraft to catch gravitational waves.

Q33.Science & TechnologyAsked in: CDS · CDS-I 2024, GKMedium

The Giant Metrewave Radio Telescope consists of

  1. A.a single parabolic antenna
  2. B.multiple parabolic antennas
  3. C.multiple circular antennas
  4. D.a combination of circular and parabolic antennas
Show answer
Correct answer: B. multiple parabolic antennas

The Giant Metrewave Radio Telescope (GMRT) is an array of 30 fully steerable parabolic dish antennas, each 45 metres across.

Q34.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IHard

In India, it is legally mandatory for which of the following to report on cyber security incidents? 1. Service providers 2. Data centres 3. Body corporate Select the correct answer using the code given below:

  1. A.1 only
  2. B.1 and 2 only
  3. C.3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

All three are legally bound to report cyber security incidents to CERT-In, the Indian Computer Emergency Response Team. CERT-In works under Section 70B of the Information Technology Act, 2000 as the national agency for incident response.

Q35.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

Consider the following statements : The Mangalyaan launched by ISRO 1. is also called the Mars Orbiter Mission 2. made India the second country to have a spacecraft orbit the Mars after USA 3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt Which of the statements given above is/are correct?

  1. A.1 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: C. 1 and 3 only

Mangalyaan is the popular name of ISRO's Mars Orbiter Mission, and India reached Mars orbit on its first attempt, but it was not the second country to do so.

Q36.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IEasy

What is the application of Somatic Cell Nuclear Transfer Technology ?

  1. A.Production of biolarvicides
  2. B.Manufacture of biodegradable plastics
  3. C.Reproductive cloning of animals
  4. D.Production of organisms free of diseases
Show answer
Correct answer: C. Reproductive cloning of animals

Somatic cell nuclear transfer, or SCNT, is the technique used to clone an animal. Scientists take an egg cell and remove its nucleus.

Q37.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IEasy

Organic Light Emitting Diodes (OLEDs) are used to create digital display in many devices. What are the advantages of OLED displays over Liquid Crystal displays ? 1. OLED displays can be fabricated on flexible plastic substrates. 2. Roll-up displays embedded in clothing can be made using OLEDs. 3. Transparent displays are possible using OLEDs. Select the correct answer using the code given below:

  1. A.1 and 3 only
  2. B.2 only
  3. C.1, 2 and 3
  4. D.None of the above statements is correct
Show answer
Correct answer: C. 1, 2 and 3

All three are real advantages of OLEDs, and they follow from the fact that each OLED pixel makes its own light.

Q38.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium

India is an important member of the 'International Thermonuclear Experimental Reactor'. If this experiment succeeds, what is the immediate advantage for India?

  1. A.It can use thorium in place of uranium for power generation
  2. B.It can attain a global role in satellite navigation
  3. C.It can drastically improve the efficiency of its fission reactors in power generation
  4. D.It can build fusion reactors for power generation
Show answer
Correct answer: D. It can build fusion reactors for power generation

ITER is an experiment to prove that nuclear fusion can work as a large-scale energy source, and every member shares its technology.

Q39.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium

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?

  1. A.1 and 2 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1,2 and 3
Show answer
Correct answer: A. 1 and 2 only

NFTs are unique blockchain tokens that can represent an asset, but being non-fungible they cannot be swapped one-for-one like money.

Q40.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IMedium

Consider the following pairs : Terms sometimes seen in news — Context/Topic 1. Belle II experiment — Artificial Intelligence 2. Blockchain technology — Digital/Cryptocurrency 3. CRISPR-Cas9 — Particle Physics Which of the pairs given above is/are correctly matched ?

  1. A.1 and 3 only
  2. B.2 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 2 only

Only blockchain is matched with its right field. Belle II is a particle physics experiment at the SuperKEKB electron-positron collider in Tsukuba, Japan; it studies B mesons to look for physics beyond the Standard Model, and Indian institutes such as TIFR take part in it.