A barcode scanner uses: MCQ with Answer and Explanation

A barcode scanner uses:

A. Laser or camera to read codes

B. Magnetic fields

C. Ink detection

D. Thermal sensors

Answer: Option A

Optical recognition.

This question belongs to: Computer Computer Hardware

No comments yet. Be the first to start the discussion!

Question #1 Report Error

The instruction cycle in CPU includes:

A. Fetch, decode, execute

B. Store only

C. Display only

D. Print only

Correct Answer: Option A

Explanation:
Basic operation.

This question belongs to: Computer Computer Hardware

Question #2 Report Error

IPS panels in monitors are known for:

A. Best viewing angles and color accuracy

B. Highest brightness

C. Lowest price

D. Fastest response for gaming only

Correct Answer: Option A

Explanation:
IPS is preferred for professional work.

This question belongs to: Computer Computer Hardware

Question #3 Report Error

The ink level monitoring in printers uses:

A. Color detection

B. Manual check only

C. Sensors or software estimation

D. Weight measurement

Correct Answer: Option C

Explanation:
Alerts users.

This question belongs to: Computer Computer Hardware