Which of the following is used for biometric input? MCQ with Answer and Explanation

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Which of the following is used for biometric input?

A. Joystick

B. Speaker

C. Fingerprint Scanner

D. Plotter

Answer: Option C

Solution (By JKSSB Mock Tests)

Fingerprint scanners are biometric input devices.

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A stylus is primarily an input device for:

A. Scanning

B. Precise pointing on touchscreens

C. Printing

D. Audio

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Correct Answer: Option B

Explanation:
Used in drawing and note-taking.

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Question #2

The process of converting analog to digital in scanners is done by:

A. ADC

B. DAC

C. CU

D. ALU

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Correct Answer: Option A

Explanation:
Analog to Digital Converter digitizes scanned data.

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Question #3

What is the main advantage of liquid cooling over air cooling?

A. Better heat dissipation for high-end CPUs

B. Lower cost

C. No maintenance

D. Easier installation

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Correct Answer: Option A

Explanation:
For overclocking and quiet operation.

This question belongs to: Computer Computer Hardware

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