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 translate domain names to IP addresses

B. To manage email routing

C. To store web pages

D. To encrypt data

Answer: Option A

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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Question #1

What is the purpose of a web browser's developer tools?

A. To manage downloads

B. To change browser settings

C. To inspect, debug, and analyze web pages

D. To block ads

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Correct Answer: Option C

Explanation:
Developer tools allow web developers to inspect HTML/CSS, debug JavaScript, analyze network requests, and profile performance.

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Question #2

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

A. A piece of hardware that boosts wireless internet signals

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

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

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

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Correct Answer: Option C

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.

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Question #3

What is the primary operational task of a 'Mail Transfer Agent' (MTA) component within internet email routing infrastructures?

A. To provide a user interface to display images inside messages

B. To forward and route electronic mail messages between different server networks using SMTP rules until they reach their destination

C. To convert plain text lines into graphic layouts natively

D. To clear old tracking cookies off terminal units

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Correct Answer: Option B

Explanation:
The Mail Transfer Agent (MTA) is software that transfers electronic mail messages from one computer server to another using SMTP.

This question belongs to: Computer Internet and Web Technologies

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