A document camera can function as a: MCQ with Answer and Explanation

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A document camera can function as a:

A. Mouse

B. Printer

C. Digital visualizer for teaching

D. Standard scanner only

Answer: Option C

Solution (By JKSSB Mock Tests)

Real-time projection.

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Question #1

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The refresh rate for standard office monitors is usually:

A. 240Hz

B. 60Hz

C. 30Hz

D. 144Hz

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Correct Answer: Option B

Explanation:
Sufficient for productivity.

This question belongs to: Computer Computer Hardware

Question #2

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Dual-core, Quad-core refer to:

A. RAM slots

B. Number of processing cores in CPU

C. Number of monitors supported

D. Storage bays

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Correct Answer: Option B

Explanation:
Multi-core processors improve multitasking.

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Question #3

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An example of wearable input device is:

A. External HDD

B. Smartwatch with sensors

C. Laser printer

D. Desktop monitor

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Correct Answer: Option B

Explanation:
Wearables like smartwatches input data via touch/sensors.

This question belongs to: Computer Computer Hardware

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