What is the typical speed of a DVD drive at 4x? MCQ with Answer and Explanation

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What is the typical speed of a DVD drive at 4x?

A. 5.28 MB/s

B. 6.0 MB/s

C. 4.0 MB/s

D. 8.8 MB/s

Answer: Option A

Solution (By JKSSB Mock Tests)

1x DVD = 1.32 MB/s, so 4x = 5.28 MB/s.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What is the purpose of a memory page?

A. A physical block of RAM

B. A fixed-size block of virtual memory

C. A section of cache

D. A file on disk

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Correct Answer: Option B

Explanation:
In virtual memory, a page is a fixed-size block of virtual memory that can be mapped to a physical frame in RAM or stored on disk.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the function of a memory controller in a system on chip (SoC)?

A. To control the memory interface

B. To process graphics

C. To handle networking

D. To manage the power supply

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Correct Answer: Option A

Explanation:
In an SoC, the memory controller manages the interface between the processor and the external memory (DRAM), handling data transfers and commands.

This question belongs to: Computer Memory and Storage Devices

Question #3

How many bits are contained in a standard hexademical digit stored in computer memory?

A. 8 bits

B. 2 bits

C. 4 bits

D. 16 bits

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Correct Answer: Option C

Explanation:
A single hexadecimal character represents values from 0 to 15, which maps to a 4-bit binary sequence (a nibble).

This question belongs to: Computer Memory and Storage Devices

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