What is the function of a DNS server? MCQ with Answer and Explanation

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What is the function of a DNS server?

A. To encrypt data

B. To translate domain names to IP addresses

C. To store web pages

D. To manage email routing

Answer: Option B

Solution (By JKSSB Mock Tests)

DNS (Domain Name System) servers resolve human-readable domain names (e.g., www.example.com) to numerical IP addresses (e.g., 192.0.2.1) required for network routing.

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Which of the following is a protocol for real-time communication between web browsers and servers?

A. HTTP/1.1

B. HTTP/2

C. FTP

D. WebSocket

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Correct Answer: Option D

Explanation:
WebSocket provides full-duplex communication over a single connection, ideal for real-time applications like chat and gaming.

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Question #2

Which of the following is a popular web-based diagramming tool?

A. Draw.io

B. Lucidchart

C. All of the above

D. Creately

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Correct Answer: Option C

Explanation:
Lucidchart, Draw.io, and Creately are all web-based tools for creating diagrams and flowcharts.

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Question #3

Which of the following options provides an accurate description of a 'Web Browser Extension' or 'Add-on'?

A. A dedicated database table used to archive old email attachments

B. A small custom software component that adds specific features, tools, or modifications to a web browser's core interface

C. The main operational routing server used by a global ISP facility

D. A piece of hardware that boosts wireless internet signals

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Correct Answer: Option B

Explanation:
Browser extensions are modular software components built on web standards that install directly into the browser to extend its functionality, such as adding ad blockers or translation tools.

This question belongs to: Computer Internet and Web Technologies

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