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. Water wash

C. No cleaning

D. Compressed air and isopropyl alcohol carefully

Answer: Option D

Solution (By JKSSB Mock Tests)

Prevents damage.

This question belongs to: Computer Computer Hardware

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Question #1

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The main advantage of vector graphics output in plotters is:

A. Color photos

B. Fast text

C. Scalability without loss of quality

D. Low cost

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Correct Answer: Option C

Explanation:
Precise lines for technical drawings.

This question belongs to: Computer Computer Hardware

Question #2

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Which device converts mechanical movement into digital signals?

A. Monitor

B. Mouse or joystick

C. Printer

D. Scanner

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Correct Answer: Option B

Explanation:
Pointing devices translate movement.

This question belongs to: Computer Computer Hardware

Question #3

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The cache coherence problem is managed by:

A. RAM

B. HDD

C. Multi-core CPU protocols

D. Single core only

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Correct Answer: Option C

Explanation:
Ensures data consistency.

This question belongs to: Computer Computer Hardware

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