What is the role of the memory data register (MDR)? MCQ with Answer and Explanation

Question

Share Report Error

What is the role of the memory data register (MDR)?

A. To store the instruction to be executed

B. To control the memory bus

C. To hold the memory address

D. To hold the data being transferred to or from memory

Answer: Option D

Solution (By JKSSB Mock Tests)

The MDR holds the data that is read from or written to memory, acting as a buffer between memory and the CPU.

This question belongs to: Computer Memory and Storage Devices

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Memory and Storage Devices Questions

Question #1

What is the typical capacity of a USB flash drive in 2026?

A. 128 GB

B. 1 GB

C. 16 MB

D. 2 TB

View Answer & Solution Discuss

Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
128 GB is a common capacity for USB flash drives in 2026, though larger capacities exist. 1 GB and 16 MB are outdated.

This question belongs to: Computer Memory and Storage Devices

Question #2

The time it takes for a targeted data sector on a hard drive platter to rotate under the read/write head is called:

A. Rotational Latency

B. Transfer Rate

C. Seek Time

D. Settling Time

View Answer & Solution Discuss

Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
Rotational latency is the delay spent waiting for the spinning disk platter to bring the specific requested data sector directly beneath the read/write head.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which of the following is a type of memory that is used for temporary storage of data in a printer?

A. ROM

B. Flash

C. RAM

D. Hard disk

View Answer & Solution Discuss

Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
Printers have RAM (buffer) to store print jobs temporarily while processing, allowing the computer to continue working.

This question belongs to: Computer Memory and Storage Devices

Explore All Memory and Storage Devices MCQs