Science and Technology previous Year Questions from 2019 (UPSC/ IAS)

1. Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the earth.

What is the significance of this observation? (upsc / IAS 2019)

2. In the context of wearable technology, which of the following tasks is/are accomplished by wearable devices? (upsc / IAS 2019)

(1) Location identification of a person

(2) Sleep monitoring of a person

(3) Assisting the hearing impaired person

Select the correct answer using the code given below.

3. Consider the following statements about a digital signature: (upsc / IAS 2019)

(1) An electronic record that identifies the certifying authority issuing it.

(2) Used to serve as a proof of identity of an individual to access information of server on the Internet.

(3) an electronic method of signing an electronic document and ensuring that the original content is unchanged.

Which of the statements given above is/are correct?

4. In The context of digital technologies for entertainment, consider the following statements : (upsc / IAS 2019)

(1) In Augmented Reality (AR), a simulated environment is created and the physical world is completely shut out.

(2) In Virtual Reality (VR), images generated from the computer are projected onto real life objects or surroundings.

(3) AR allows individuals to be present in the world and improves the experience using the camera of a smart-phone or PC.

(4) VR closes the world, and transposes an individual, providing a complete immersion experience.

Which of the statements given above is/are correct?

5. With reference to communication technologies, what is/are the difference/differences between

LTE (Long-Term Evolution) and VoLTE (Voice over Long-Term Evolution)? (upsc / IAS 2019)

(1) LTE is commonly marketed as 3G and VoLTE is commonly marketed as advanced 3G.

(2) LTE is data-only technology and VoLTE is voice-only technology.

Select the correct answer using the code given below

6. Which of the following statements is not correct? (upsc / IAS 2019)

7. What is cas9 protein that is often mentioned in the news ? (upsc / IAS 2019)

8. Which of the following are the reasons for the occurence of multi-drug resistance in microbial pathogens in India? (upsc / IAS 2019)

(1) Genetic predisposition of some people.

(2) Taking incorrect doses of antibiotics to cure diseases.

(3) Using antibiotics in livestock farming.

(4) Multiple chronic diseases in some people.

Select the correct answer using the code given below.

9. ‘RNA interference (RNAi)’ technology has gained popularity in the last few years.why? (upsc / IAS 2019)

(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 virtual pathogens.

Select the correct answer using the code given below.

10. With reference to the recent developments in science, which one of the following statements is not correct? (upsc / IAS 2019)

11. The word ‘Denisovan’ is sometimes mentioned in media in reference to (upsc / IAS 2019)