What is the purpose of a memory address register (MAR)? MCQ with Answer and Explanation

Question

Share Report Error

What is the purpose of a memory address register (MAR)?

A. To hold the address of the memory location to be accessed

B. To store the program counter

C. To hold the data read from or written to memory

D. To hold the instruction currently being executed

Answer: Option A

Solution (By JKSSB Mock Tests)

The MAR holds the address of a memory location from which data will be fetched or to which data will be stored.

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

Which of the following is a characteristic of static RAM (SRAM)?

A. High density and low cost

B. Fast and expensive

C. Used as main memory in PCs

D. Requires periodic refresh

View Answer & Solution Discuss

Get Complete Subject PDF for Computer

Correct Answer: Option B

Explanation:
SRAM is fast and expensive compared to DRAM. It does not require refreshing and is used for cache memory. DRAM is used as main memory and is dense and cheaper.

This question belongs to: Computer Memory and Storage Devices

Question #2

Which of the following storage devices has the largest storage capacity per unit cost?

A. Magnetic tape

B. Blu-ray disc

C. Hard disk

D. SSD

View Answer & Solution Discuss

Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
Magnetic tape offers the lowest cost per gigabyte, making it ideal for massive archival storage, though access is slow.

This question belongs to: Computer Memory and Storage Devices

Question #3

What is the memory cache 'miss' penalty?

A. The extra time needed to fetch data from the slower main memory when it is not found in the cache.

B. The permanent loss of data due to system power fluctuations.

C. The financial cost of manufacturing faster cache chips.

D. The reduction in processing speed when multiple applications compete for CPU space.

View Answer & Solution Discuss

Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
When the CPU looks for data in the cache and fails to find it (a cache miss), it suffers a time delay penalty because it must fetch that data from the slower system RAM.

This question belongs to: Computer Memory and Storage Devices

Explore All Memory and Storage Devices MCQs