What is the primary purpose of a memory hierarchy in a computer system? MCQ with Answer and Explanation

What is the primary purpose of a memory hierarchy in a computer system?
A. To reduce cost
B. To increase storage capacity
C. To simplify the architecture
D. To balance speed, cost, and capacity
Answer: Option D
Solution (By JKSSB Mock Tests)
The memory hierarchy is designed to provide a trade-off between speed (fast but expensive) and capacity (slow but cheap), optimizing overall system performance and cost.

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Practice More Memory and Storage Devices Questions

Question #1
What is the typical capacity of a single-layer BD-R (Blu-ray recordable) disc?
A. 128 GB
B. 25 GB
C. 4.7 GB
D. 50 GB

Correct Answer: Option B


Explanation:
Single-layer BD-R holds 25 GB, dual-layer 50 GB, and triple-layer 100 GB or more. Standard Blu-ray is 25 GB.

This question belongs to: Computer Memory and Storage Devices
Question #2
What does the acronym 'HDD' stand for?
A. Hybrid Digital Drive
B. Heavy Duty Drive
C. High Density Drive
D. Hard Disk Drive

Correct Answer: Option D


Explanation:
HDD stands for Hard Disk Drive, a data storage device using magnetic storage on rotating platters.

This question belongs to: Computer Memory and Storage Devices
Question #3
What does the term 'random access' mean in memory?
A. Data can be accessed in any order with the same access time
B. Data is accessed randomly without addressing
C. Access time depends on the data location
D. Data can only be accessed sequentially

Correct Answer: Option A


Explanation:
Random access memory (RAM) allows any memory location to be accessed directly in roughly the same amount of time, regardless of its physical location.

This question belongs to: Computer Memory and Storage Devices