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UPSC exam Prelims Question paper 2018- Science and Tech

1. Consider the following phenomena :
1. Light is affected by gravity.
2. The Universe is constantly expanding.
3. Matter warps its surrounding space-time.
Which of the above is/are the prediction/predictions of Albert Einstein's General Theory of Relativity, often discussed in media?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Answer. c

2. With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements :
1. GM mustard has the genes of soil the bacterium that gives the plant the property of pest-resistance to a wide variety of pests.
2. GM mustard has the genes that allow the plant cross-pollination and hybridization.
3. GM mustard has been developed jointly by the IARI and Punjab Agricultural University.
Which of the statements given above is/are correct?
(a)1 and 3 only
(b)2 only
(c)2 and 3 only
(d)1, 2 and 3

Answer. b

3. Consider the following pairs :
Terms have sometimes seen in the 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?
(a) 1 and 3 only
(b) 2 only
(c) 2 and 3 only
(d) 1, 2 and 3

Answer. b


4. When the alarm of your smartphone rings in the morning, you wake up and tap it to stop the alarm which causes your geyser to be switched on automatically. The smart mirror in your bathroom shows the day's weather and also indicates the level of water in your overhead tank. After you take some groceries from your refrigerator for making breakfast, it recognizes the shortage of stock in it and places an order for the supply of fresh grocery items. When you step out of your house and lock the door, all lights, fans, geysers, and AC machines get switched off automatically. On your way to the office, your car warns you about traffic congestion ahead and suggests an alternative route, and if you are late for a meeting, it sends a- message to your office accordingly.
In the context of emerging communication technologies, which one of the following term" best applies to the above scenario?
(a) Border Gateway Protocol
(b) Internet of Things
(c) Internet Protocol
(d) Virtual Private Network

Answer.b

5. In which of the following areas can GPS technology be used?
1. Mobile phone operations
2. Banking operations
3. Controlling the power grids
Select the correct answer using the code given below:
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Answer.d

6. "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 :
(a) 1, 3 and 4 only
(b) 2, 3 and 5 only
(c) 1 and 4 only
(d) 1, 2, 3, 4 and 5

Answer.d

7. The identity platform `Aadhaar' provides open "Application Programming Interfaces (APIs)". What does it imply?
1. It can be integrated into any electronic device.
2. Online authentication using iris is possible.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Answer.c

8. 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 l vehicle with the first and third stages l using solid rocket motors; and the second and fourth stages using liquid rocket engines.
Which of the statements given above is/are correct.?
(a) 1 only
(b) 2 and 3
(c) 1 and 2
(d) 3 only

Answer.a
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