ITPEC IP April 2020 Question 10
ITPEC IP April 2020 — Question 10 of 100
Cache memory has the shortest access time among the listed storage units. It is small, high-speed memory located close to or within the CPU and keeps copies of frequently or recently used instructions and data.
Answer (c)
Why not others:
- main memory is slower than cache
- an SSD is secondary storage and is much slower than semiconductor main memory
- an HDD also uses secondary storage and adds mechanical seek and rotation delays
Key rule: Typical speed order is cache, main memory, SSD, then HDD, while capacity and cost per bit generally move in the opposite direction.
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