ITPEC IP October 2022 Question 13
ITPEC IP October 2022 — Question 13 of 100
Cache memory has the shortest access time among the listed storage units. It is implemented with fast memory close to or inside the CPU and serves data before the processor must wait for main memory. Main memory is slower, while SSDs and HDDs are secondary storage with much longer access times.
Answer (c)
Why not others:
- main memory is fast but slower than CPU cache
- SSD has no mechanical seek but remains slower than semiconductor working memory
- HDD is slowest here because of mechanical positioning and rotation
Key rule: The usual speed hierarchy is cache, main memory, SSD, then HDD; speed generally trades off against capacity and cost per bit.
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