What is the purpose of a memory buffer? MCQ with Answer and Explanation

What is the purpose of a memory buffer?
A. To permanently store data
B. To temporarily hold data during transfer
C. To increase memory capacity
D. To convert data formats
Answer: Option B
Solution (By JKSSB Mock Tests)
A memory buffer is a temporary storage area used to hold data while it is being transferred between different devices or between different speeds, to smooth out data flow.

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Practice More Memory and Storage Devices Questions

Question #1
What is the average access time of a hard disk typically composed of?
A. Seek time + Rotational latency
B. Rotational latency + Transfer time
C. Seek time + Rotational latency + Transfer time
D. Seek time + Transfer time

Correct Answer: Option C


Explanation:
The average access time for a hard disk is the sum of seek time (head movement), rotational latency (waiting for sector), and transfer time (reading/writing data).

This question belongs to: Computer Memory and Storage Devices
Question #2
What is the typical capacity of a 2.5-inch hard disk drive used in laptops?
A. 4-8 TB
B. 1-2 GB
C. 500 GB to 2 TB
D. 10-100 GB

Correct Answer: Option C


Explanation:
2.5-inch HDDs commonly range from 500 GB to 2 TB for laptops, with larger capacities available. 3.5-inch drives typically have higher capacities (up to 10 TB+).

This question belongs to: Computer Memory and Storage Devices
Question #3
What is the primary role of the address bus in a computer's memory architecture?
A. To communicate the physical memory location coordinate being targeted for read or write.
B. To supply electrical voltage to the dynamic memory refresh circuits.
C. To transfer the actual data payload bits between components.
D. To regulate the processing clock speed of the graphics adapter.

Correct Answer: Option A


Explanation:
The address bus is a directional pathway used exclusively by the CPU to point to the specific hardware memory address location it wants to interact with.

This question belongs to: Computer Memory and Storage Devices