What is the typical speed of a DVD drive at 16x? MCQ with Answer and Explanation

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What is the typical speed of a DVD drive at 16x?

A. 48.5 MB/s

B. 22.16 MB/s

C. 21.12 MB/s

D. 16 MB/s

Answer: Option C

Solution (By JKSSB Mock Tests)

1x DVD is 1.32 MB/s, so 16x = 16 * 1.32 = 21.12 MB/s.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What is the typical write speed of a DVD-R disc?

A. 11.08 MB/s (1x)

B. 36 MB/s (1x)

C. 1.32 MB/s (1x)

D. 4.5 MB/s (1x)

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Correct Answer: Option C

Explanation:
1x DVD data rate is 11.08 Mbit/s = 1.32 MB/s. So write speed at 1x is 1.32 MB/s. Higher multipliers increase speed.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the function of a memory controller's command scheduler?

A. To reorder commands for better performance

B. To decode commands

C. To handle power management

D. To generate clock signals

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Correct Answer: Option A

Explanation:
The command scheduler in a memory controller reorders commands to maximize bus utilization and reduce latency.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which technology is applied in writing data onto a CD-RW disc to allow repeated overwriting?

A. Dye ablation

B. Phase-change alloy material

C. Floating gate transistor charging

D. Magnetic field reversal

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Correct Answer: Option B

Explanation:
CD-RW discs use a phase-change material that can transition between crystalline (reflective) and amorphous (absorbent) states via laser heating to clear or write data.

This question belongs to: Computer Memory and Storage Devices

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