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Question 30

Computer Awareness Computer memory Medium

Consider the following type of memories. $$ \text{ (A). Hard Disk Drive (HDD) } $$ $$ \text{ (B). Cache Memory } $$ $$ \text{ (C). Random Access Memory (RAM) } $$ $$ \text{ (D). Registers } $$ Arrange the above memories according to their access speed (from fastest to slowest)

(A) (D), (C), (B), (A)
(B) (A), (C), (B), (D)
(C) (B), (D), (C), (A)
(D) (D), (B), (C), (A)
View Dynamic Solution & Explanation ▼
Correct Solution: Option D

Step-by-step Solution:

Solution:

We arrange memories by access speed (fastest → slowest). Typical hierarchy and reasoning:

  1. Registers — located inside the CPU, they provide the fastest access (single CPU cycle or less).
  2. Cache Memory — small, very fast memory between CPU and RAM (L1/L2/L3 levels). Slower than registers but much faster than main memory.
  3. Random Access Memory (RAM) — main memory (DRAM); larger but slower than cache.
  4. Hard Disk Drive (HDD) — mechanical storage with the highest latency and lowest access speed among the listed items.

✅ Correct order (fastest → slowest): Registers > Cache > RAM > HDD

✅ Corresponding option: (D) (D), (B), (C), (A)

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