Question 1

With reference to 'Li-Fi', recently in the news, which of the following statements is/are correct? 1. It uses light as the medium for high-speed data transmission. 2. It is a wireless technology and is several times faster than 'Wi-Fi'. Select the correct answer using the code given below.

Accepted Answer

Li-Fi is a new technology that uses light from LEDs to transmit data at high speeds, similar to Wi-Fi. It is a wireless communication technology that is faster than Wi-Fi. Li-Fi can achieve data transfer rates of up to 10 gigabytes per second. This means that both statements in the question are correct, as Li-Fi utilizes light for data transmission and is faster than Wi-Fi.

Question 2

Consider the following statements regarding AI Action Summit held in Grand Palais, Paris in February 2025: I. Co-chaired with India, the event builds on the advances made at the Bletchley Park Summit held in 2023 and the Seoul Summit held in 2024. II. Along with other countries, US and UK also signed the declaration on inclusive and sustainable AI. Which of the statements given above is/are correct?

Accepted Answer

The AI Action Summit held in Grand Palais, Paris in February 2025 was co-chaired with India and built on the advances made at the Bletchley Park Summit held in 2023 and the Seoul Summit held in 2024. This makes the first statement correct. The second statement about the US and UK signing the declaration on inclusive and sustainable AI is not mentioned in the explanation, making it incorrect.

Question 3

The memory of a computer is commonly expressed in terms of kilobytes or megabytes. A byte is made up of:

Accepted Answer

In the field of computing and telecommunications, memory in a computer is often measured in kilobytes or megabytes. A byte, the basic unit of digital information, typically comprises eight bits.

Question 4

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?

Accepted Answer

Closed-circuit Television, Radio Frequency Identification, and Wireless Local Area Network are all considered Short-Range devices/technologies due to their limited coverage area. Closed-circuit Television is used for surveillance within a confined space, Radio Frequency Identification is used for tracking items within a short distance, and Wireless Local Area Network provides connectivity within a limited area such as a home or office.

Question 5

What is "Virtual Private Network"?

Accepted Answer

A Virtual Private Network (VPN) is a technology that allows users to access their organization's network securely over a public internet connection. It creates a private network within a public network by using encryption and tunneling protocols to protect the transmitted information.

Information Technology — UPSC Previous Year Questions

With reference to 'Li-Fi', recently in the news, which of the following statements is/are correct? 1. It uses light as the medium for high-speed data transmission. 2. It is a wireless technology and is several times faster than 'Wi-Fi'. Select the correct answer using the code given below.

Year-wise Distribution

Sample Questions

Information Technology — UPSC Previous Year Questions

With reference to 'Li-Fi', recently in the news, which of the following statements is/are correct? 1. It uses light as the medium for high-speed data transmission. 2. It is a wireless technology and is several times faster than 'Wi-Fi'. Select the correct answer using the code given below.

Year-wise Distribution

Sample Questions