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

Which input device uses Hall effect sensors?

A. Scanners

B. Monitors

C. Optical mice

D. Some mechanical keyboards for durability

Answer: Option D

Contactless switching.

This question belongs to: Computer Computer Hardware

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Question #1 Report Error

What does the term 'form factor' apply to besides motherboards?

A. Power supplies and cases

B. Monitors only

C. Keyboards only

D. Printers

Correct Answer: Option A

Explanation:
Standard sizes ensure compatibility.

This question belongs to: Computer Computer Hardware

Question #2 Report Error

Which component has direct memory access (DMA)?

A. Hard disk controller

B. Keyboard

C. Monitor

D. Speaker

Correct Answer: Option A

Explanation:
DMA allows devices to access memory without CPU.

This question belongs to: Computer Computer Hardware

Question #3 Report Error

What does 'bus width' determine?

A. Display resolution

B. Amount of data transferred simultaneously

C. Storage capacity

D. Clock speed

Correct Answer: Option B

Explanation:
E.g., 64-bit data bus.

This question belongs to: Computer Computer Hardware