A common input for POS systems is: MCQ with Answer and Explanation

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A common input for POS systems is:

A. Joystick

B. Touchscreen and barcode scanner

C. Mouse only

D. Standard keyboard

Answer: Option B

Solution (By JKSSB Mock Tests)

Retail efficiency.

This question belongs to: Computer Computer Hardware

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What is the benefit of modular power supplies?

A. No difference

B. Slower power delivery

C. Lower cost always

D. Better cable management and efficiency

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Correct Answer: Option D

Explanation:
Reduces clutter in PC cases.

This question belongs to: Computer Computer Hardware

Question #2

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A handheld scanner is best for:

A. Photo negatives

B. Batch processing

C. High quality flat documents

D. Scanning irregular or large objects

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Correct Answer: Option D

Explanation:
Flexibility.

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Question #3

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What is the role of firmware in hardware?

A. Low-level software controlling hardware

B. OS kernel only

C. User interface

D. Application software

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Correct Answer: Option A

Explanation:
Like BIOS/UEFI.

This question belongs to: Computer Computer Hardware

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