The main component in a barcode system is: MCQ with Answer and Explanation

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The main component in a barcode system is:

A. Keyboard

B. Monitor

C. Printer only

D. Scanner and decoder

Answer: Option D

Solution (By JKSSB Mock Tests)

Reads and interprets codes.

This question belongs to: Computer Computer Hardware

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Question #1

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What is the purpose of a calibration tool for monitors?

A. Increase resolution

B. Speed up refresh rate

C. Accurate colors and brightness

D. Reduce weight

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Correct Answer: Option C

Explanation:
For photographers and designers.

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Question #2

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The purpose of ECC in RAM is to:

A. Increase speed

B. Improve graphics

C. Detect and correct memory errors

D. Reduce cost

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Correct Answer: Option C

Explanation:
Critical for servers.

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Question #3

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Which input device is used by architects for CAD?

A. Barcode reader

B. Webcam

C. Standard mouse

D. Graphics tablet

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Correct Answer: Option D

Explanation:
Graphics tablets offer precision for design.

This question belongs to: Computer Computer Hardware

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