A laser mouse uses: MCQ with Answer and Explanation

A laser mouse uses:

A. Mechanical

B. Laser for better surface compatibility

C. Ball

D. LED only

Answer: Option B

Precision tracking.

This question belongs to: Computer Computer Hardware

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Question #1 Report Error

Which component stores data permanently even when the computer is powered off?

A. Hard Disk Drive

B. ROM

C. Cache Memory

D. RAM

Correct Answer: Option A

Explanation:
HDD is a non-volatile secondary storage device.

This question belongs to: Computer Computer Hardware

Question #2 Report Error

Which hardware supports RAID configurations?

A. Keyboard

B. Speaker

C. Motherboard or RAID controller card

D. Monitor

Correct Answer: Option C

Explanation:
For data redundancy and performance.

This question belongs to: Computer Computer Hardware

Question #3 Report Error

What is the main function of I/O ports?

A. Processing data

B. Connecting input and output devices

C. Storing programs

D. Cooling the system

Correct Answer: Option B

Explanation:
Ports like USB, HDMI allow device connectivity.

This question belongs to: Computer Computer Hardware