Science and Technology (Part-III)

Total Questions: 28

1. 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? [2017-1]

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:

(a) 1 and 3 only
(b) 2 only
(c) 1, 2 and 3
(d) None of the above

Correct Answer: (c) 1, 2 and 3

Solution:OLEDs can be formed on any substrate such as glasses, cloths, plastic and other bendable substrates. So accordingly, all three are possible. Answer "c".

2. Consider the following pairs of Terms sometimes seen in news vs Context/Topic: [2018-1]

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

Correct Answer: (b) 2 only

Solution:CRISPR, a new genome editing tool, could transform the field of biology. It allows scientists to edit genomes with unprecedented precision.

So, #3 is wrong, CRISPR is definitely not associated with Particle Physics. This eliminates a, c and (d) Thus we are left with answer "b: only 2"

3. 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 min-or 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 recognises 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 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? [2018-1]

(a) Border Gateway Protoco
(b) Internet of Things
(c) Internet Protocol
(d) Virtual Private Network

Correct Answer: (b) Internet of Things

Solution:The IoT is the network of physical objects which are accessed through the Internet. Internet of Things (IoT) has a broad scope, a heart patient can do heart monitoring easily, farm animals can be easily sensed with a help of biochip transponder, an automobile that has built-in sensors can alert the driver when tire pressure is low. So, "b" is the correct term related to above passage.

4. In which of the following areas can GPS technology be used? [2018-1]

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

Correct Answer: (d) 1, 2 and 3

Solution:2018: Government's EASE framework for Public sector Banks provides for developing mobile app to locate nearest ATMs (so that can be possible only via GPS.) In 2016, PNB bank had already launched android mobile apps enabling the customer to locate nearest PNB ATM using GPS. so, yes second statement is right, GPS can indeed be used in Banking operations.

2016: The Department of Telecom has mandated that mobile phones sold in India will come with a dedicated 'panic button' and Global Positioning System (GPS) facility that can be used to send out a signal in case of distress. This is aimed at improving the safety of women and ensuring a quick response from security agencies. So, first statement is right. Thus we are left with correct answer, d: 1, 2 and 3.

5. "3D printing" has applications in which of the following? [2018-1]

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

Correct Answer: (d) 1, 2, 3, 4 and 5

Solution:Bioprinting process in which living tissues can be 3d-printed using stem-cell containing bio ink. This means 3D printing has applications in bionic ears (#2) and reconstructive surgeries (#4). There is only one option where 2 and 4 are together i.e. Option d: all statements correct.

6. With reference to communication technologies, what is/are the difference/differences between LTE (Long-Term Evolution) and Vo LTE (Voice over Long-Term Evolution)? [2019-1]

1. LTE is commonly marketed as 3G and Vo LTE is commonly marketed as advanced 3G.

2. LTE is data-only technology and Vo LTE is voice-only technology.

Select the correct answer using the code given below

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Correct Answer: (d) Neither 1 nor 2

Solution:Vo LTE allows an operator to offer both voice and data over a 4G LTE network. The big advantage of Vo LTE is that call quality is superior to 3G and 2G connections (through which voice is usually routed) as much more data can be transferred via 4G.

From above statement, we can infer: VOLTE associated with 4g so #1 is wrong. VOLTE allows both data and voice so #2 is wrong.

7. In The Context Of Digital Technologies for entertainment, consider the following statements: [2019-1]

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 individual to be present in the world and improves the experience using the camera of smart-phone or PC.

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

Which of the statements given above is/are correct?

(a) 1 and 2 only
(b) 3 and 4
(c) 1, 2 and 3
(d) 4 only

Correct Answer: (b) 3 and 4

Solution:Virtual Reality: computer-generated simulation of real-life environments that are primarily achieved with the use of headsets. When worn, the user's vision and hearing are stimulated to provide realistic experiences.

Augmented Reality: superimposition of computer- generated images on existing environments to make them more interactive. It is utilised in the form of applications for mobile devices such as Pokemon GO. So, #2 is wrong. This eliminates A and C. Based on the same sentence, #3 is correct. So, b is the answer.

8. Consider the following statements about a digital signature: [2019-1]

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 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?

(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1,2 and 3

Correct Answer: (c) 3 only

Solution:As per the Corporate Affairs Ministry website, Digital Signature means an electronic signature useful to authenticate the identity of the sender of a message or the signer of an electronic document. This ensures that the original content of the document is not changed. So #3 is right. The other statements are related to Digital Signature Certificates (DSC) which is a separate mechanism.

9. In the context of wearable technology, which of the following tasks is/are accomplished by wearable devices? [2019-1]

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.

(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3

Correct Answer: (d) 1, 2 and 3

Solution:Wearable devices such as smart watches can track GPS location of a person and monitor his heart rate and sleeping pattern so 1 and 2 are right. There is only one option d where they're together.

But just to crosscheck validity of third statement: 2018-Feb theHindu: Re Sound company's newest product, a hearing aid, LINX 3D was named an Honoree in both the Accessible Tech and Wearable Tech categories at Consumer Electronics Show (CES), in Las Vegas. So #3 is right Answer d: 1, 2 and 3.

10. Consider the following activities: [2020-1]

1. Spraying pesticides on a crop field

2. Inspecting the craters of active volcanoes

3. Collecting breath samples from spouting whales for DNA analysis

At the present level of technology, which of the above activities can be successfully carried out by using drones?

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Correct Answer: (d) 1, 2 and 3

Solution:Drone used for spraying pesticides on a crop field says the Hindu. So #1 is correct.

Drone can be used for monitoring active volcanoes, says Science USA news.

Drones can be used for doing statement#3, says reuters com article.

So all three correct.

12 3 Next »

Science and Technology (Part-III)

1. 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? [2017-1]

2. Consider the following pairs of Terms sometimes seen in news vs Context/Topic: [2018-1]

4. In which of the following areas can GPS technology be used? [2018-1]

5. "3D printing" has applications in which of the following? [2018-1]

6. With reference to communication technologies, what is/are the difference/differences between LTE (Long-Term Evolution) and Vo LTE (Voice over Long-Term Evolution)? [2019-1]

7. In The Context Of Digital Technologies for entertainment, consider the following statements: [2019-1]

8. Consider the following statements about a digital signature: [2019-1]

9. In the context of wearable technology, which of the following tasks is/are accomplished by wearable devices? [2019-1]

10. Consider the following activities: [2020-1]

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