The best way to clean a keyboard is: MCQ with Answer and Explanation

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The best way to clean a keyboard is:

A. Vacuum only

B. Compressed air and isopropyl alcohol carefully

C. No cleaning

D. Water wash

Answer: Option B

Solution (By JKSSB Mock Tests)

Prevents damage.

This question belongs to: Computer Computer Hardware

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Question #1

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What does 'duplex' mean in printing context?

A. Double-sided printing

B. Color only

C. Double resolution

D. Fast mode

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Correct Answer: Option A

Explanation:
Eco-friendly.

This question belongs to: Computer Computer Hardware

Question #2

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Which is a contactless input technology?

A. Mechanical switches

B. RFID and NFC

C. Membrane keyboard

D. Trackball

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Correct Answer: Option B

Explanation:
Proximity reading.

This question belongs to: Computer Computer Hardware

Question #3

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Which technology is used in some keyboards for silent operation?

A. Optical only

B. Scissor-switch or membrane

C. Mechanical clicky

D. All are loud

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Correct Answer: Option B

Explanation:
Suitable for offices.

This question belongs to: Computer Computer Hardware

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