DDR4 is a type of: MCQ with Answer and Explanation

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DDR4 is a type of:

A. RAM

B. Hard disk

C. Processor

D. Monitor

Answer: Option A

Solution (By JKSSB Mock Tests)

DDR4 is a generation of Synchronous Dynamic RAM.

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Question #1

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The number of keys in a standard keyboard is usually:

A. 200

B. 50

C. 101 or 104

D. 75

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Correct Answer: Option C

Explanation:
Full-size keyboards.

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Question #2

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A 3D mouse or space mouse is used for:

A. Printing

B. Text entry

C. 3D modeling and navigation

D. 2D only

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Correct Answer: Option C

Explanation:
CAD/CAM applications.

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Question #3

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Which input device uses reflected light for operation?

A. Optical mouse

B. Mechanical mouse

C. Trackball

D. Joystick

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Correct Answer: Option A

Explanation:
Optical mouse detects movement via light reflection.

This question belongs to: Computer Computer Hardware

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