What is the typical speed of a CD-ROM drive at 52x? MCQ with Answer and Explanation

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What is the typical speed of a CD-ROM drive at 52x?

A. 7.8 MB/s

B. 52 MB/s

C. 1.3 MB/s

D. 52 KB/s

Answer: Option A

Solution (By JKSSB Mock Tests)

1x CD speed is 150 KB/s. 52x is 52 * 150 = 7800 KB/s = 7.8 MB/s. So option B is correct.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What does the term 'double buffering' refer to in memory management?

A. Using two separate memory banks

B. Using two buffers to overlap I/O and processing

C. Storing two copies of data for redundancy

D. Using two levels of cache

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Correct Answer: Option B

Explanation:
Double buffering uses two buffers: one is being filled/read while the other is being processed, allowing overlap and reducing wait times.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the purpose of a memory expansion slot?

A. To add a graphics card

B. To allow additional RAM modules to be installed

C. To provide power to memory

D. To connect a hard disk

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Correct Answer: Option B

Explanation:
Memory expansion slots (DIMM slots) are used to add more RAM modules to increase system memory.

This question belongs to: Computer Memory and Storage Devices

Question #3

What storage unit is equivalent to $1024^{6}$ bytes ($2^{60}$ bytes) in computer data storage scaling scales?

A. 1 Petabyte

B. 1 Yottabyte

C. 1 Zettabyte

D. 1 Exabyte

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Correct Answer: Option D

Explanation:
The scaling path for binary exponents places $2^{10}$ as KB, $2^{20}$ as MB, $2^{30}$ as GB, $2^{40}$ as TB, $2^{50}$ as PB, and $2^{60}$ bytes as 1 Exabyte (EB).

This question belongs to: Computer Memory and Storage Devices

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