Which of the following memory types has the fastest access time in a computer system hierarchy? MCQ with Answer and Explanation

Question
Which of the following memory types has the fastest access time in a computer system hierarchy?
A. Secondary Storage
B. Registers
C. Cache Memory
D. Main Memory (RAM)
Answer: Option B
Solution (By JKSSB Mock Tests)
CPU registers are located inside the processor itself and have the fastest access time, followed by cache memory, main memory, and secondary storage.
This question belongs to: Computer Memory and Storage Devices
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Question #1
What is the average access time of a hard disk typically composed of?
A. Rotational latency + Transfer time
B. Seek time + Transfer time
C. Seek time + Rotational latency + Transfer time
D. Seek time + Rotational latency
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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 function of a cache memory?
A. To permanently store data
B. To provide backup storage
C. To store the operating system
D. To hold frequently accessed data for quick access
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Correct Answer: Option D

Explanation:
Cache memory is a small, fast memory located close to the CPU that stores copies of frequently accessed data from main memory to reduce average access time.
This question belongs to: Computer Memory and Storage Devices
Question #3
What is the typical capacity of a double-sided DVD?
A. 8.5 GB
B. 17 GB
C. 9.4 GB
D. 4.7 GB
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Correct Answer: Option C

Explanation:
Double-sided DVD (DVD-10) holds 9.4 GB (two layers of 4.7 GB each). Dual-layer single-sided (DVD-9) holds 8.5 GB.
This question belongs to: Computer Memory and Storage Devices
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