Which input device uses Hall effect sensors? MCQ with Answer and Explanation

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Which input device uses Hall effect sensors?

A. Monitors

B. Some mechanical keyboards for durability

C. Optical mice

D. Scanners

Answer: Option B

Solution (By JKSSB Mock Tests)

Contactless switching.

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Question #1

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What is the function of a print head in inkjet?

A. Feed paper

B. Scan image

C. Heat toner

D. Eject ink droplets

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Correct Answer: Option D

Explanation:
Core printing mechanism.

This question belongs to: Computer Computer Hardware

Question #2

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What is the purpose of CMOS in computers?

A. To store BIOS settings and system time

B. To provide power backup

C. To process graphics

D. To connect USB devices

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Correct Answer: Option A

Explanation:
CMOS battery-powered memory holds configuration.

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Question #3

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Line printers are used for:

A. Color graphics

B. Photo printing

C. Home use

D. High-speed bulk printing

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Correct Answer: Option D

Explanation:
They are high-volume impact printers.

This question belongs to: Computer Computer Hardware

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