What is the purpose of a memory's refresh cycle? MCQ with Answer and Explanation

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

A. To clear memory contents

B. To synchronize with the CPU

C. To restore charge in DRAM capacitors

D. To increase memory speed

Answer: Option C

Solution (By JKSSB Mock Tests)

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

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Practice More Memory and Storage Devices Questions

Question #1

What is the function of the memory controller?

A. To store the BIOS

B. To handle network traffic

C. To control the hard disk

D. To manage data transfer between CPU and RAM

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Correct Answer: Option D

Explanation:
The memory controller is a chip that manages the flow of data between the CPU and the system memory (RAM). It is often integrated into the CPU or on the motherboard.

This question belongs to: Computer Memory and Storage Devices

Question #2

How many bytes are there in one Megabyte (MB) when calculated using binary measurement standard?

A. 1,048,576 Bytes

B. 1024 Bytes

C. 1,000,000 Bytes

D. 1000 Bytes

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Correct Answer: Option A

Explanation:
In binary notation, 1 KB = 1024 Bytes, and 1 MB = 1024 KB. Therefore, 1024 * 1024 = 1,048,576 Bytes.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which of the following is a type of optical disc that is read-only?

A. DVD-RAM

B. DVD-RW

C. Blu-ray ROM (BD-ROM)

D. CD-R

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Correct Answer: Option C

Explanation:
BD-ROM is read-only. CD-R and DVD-R are recordable once, DVD-RW and DVD-RAM are rewritable.

This question belongs to: Computer Memory and Storage Devices

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