Which storage allocation unit represents the equivalent value of exactly $2^{50}$ bytes? MCQ with Answer and Explanation

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Which storage allocation unit represents the equivalent value of exactly $2^{50}$ bytes?

A. 1 Zettabyte

B. 1 Exabyte

C. 1 Terabyte

D. 1 Petabyte

Answer: Option D

Solution (By JKSSB Mock Tests)

Following binary exponential calculations: $2^{10}$ = KB, $2^{20}$ = MB, $2^{30}$ = GB, $2^{40}$ = TB, and $2^{50}$ = 1 Petabyte (PB).

This question belongs to: Computer Memory and Storage Devices

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Question #1

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Which of the following is a type of memory that is used for storing temporary data in a web browser?

A. Cache memory

B. ROM

C. RAM

D. Hard disk

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Correct Answer: Option C

Explanation:
Web browsers store temporary data (cookies, cache) in RAM and also on disk, but the primary temporary storage is RAM for active sessions.

This question belongs to: Computer Memory and Storage Devices

Question #2

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What is the purpose of a memory's refresh cycle?

A. To restore charge in DRAM capacitors

B. To clear memory contents

C. To increase memory speed

D. To synchronize with the CPU

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Correct Answer: Option A

Explanation:
DRAM requires periodic refreshing to restore the charge in its capacitors, preventing data loss due to leakage.

This question belongs to: Computer Memory and Storage Devices

Question #3

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What is the size of a standard sector in traditional hard disk drives?

A. 4096 Bytes

B. 2048 Bytes

C. 1024 Bytes

D. 512 Bytes

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Correct Answer: Option D

Explanation:
Traditional hard drive architectures format sectors to a standard size of 512 bytes, though newer 'Advanced Format' drives use 4096 bytes (4 KB).

This question belongs to: Computer Memory and Storage Devices

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