Identify the correct sequence of the following computer storage components A-D…
2023
Identify the correct sequence of the following computer storage components A-D in the descending order of their access speed (from fastest to slowest).
A. Cache memory
B. Main memory
C. Magnetic disk
D. CPU Registers
Choose the correct answer from the options given below:
Answer: D. D, A, B, C — ConceptA memory hierarchy arranges storage by how quickly the processor can access data. Components closest to the CPU provide the lowest access time; larger,…
- A.
A, B, C, D
- B.
C, B, A, D
- C.
C, B, D, A
- D.
D, A, B, C
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Show answer & explanation
Correct answer: D
Concept
A memory hierarchy arranges storage by how quickly the processor can access data.
Components closest to the CPU provide the lowest access time; larger, persistent storage is progressively slower.
Application
CPU registers are inside the processor and are accessed directly during instruction execution, so they are the fastest here.
Cache memory keeps frequently used data close to the CPU and is slower than registers but faster than main memory.
Main memory serves active programs and data, but its access time is greater than that of cache.
A magnetic disk uses secondary-storage access and is much slower than semiconductor registers, cache, and main memory.
Cross-check
Moving down the hierarchy generally increases both capacity and access time: registers, cache, main memory, then magnetic disk.
Result
Therefore, the descending order of access speed is D, A, B, C.