Which of the following statements is true about the impact of a cache on storage

Question

Which of the following statements is true about the impact of a cache on storage device read performance?

Performance will increase if the cache controller can accurately guess which data the CPU will ask for next and fetch it into the cache before the CPU asks for it.

If the cache already contains the data being read, it can be delivered more quickly because access to the cache is faster than access to the underlying storage device.

Reading data that was recently written to the storage device may occur more quickly since the cache may still contain the data.

Performance improvements for read operations will probably be greater than for write operations

Performance will increase if the cache controller can accurately guess which data the CPU will ask for next and fetch it into the cache before the CPU asks for it.

If the cache already contains the data being read, it can be delivered more quickly because access to the cache is faster than access to the underlying storage device.

Reading data that was recently written to the storage device may occur more quickly since the cache may still contain the data.

Performance improvements for read operations will probably be greater than for write operations

Explanation / Answer

The answers are option A, B, and D

The cache is the fastest memory in the CPU. So any data present in the cache is very easy and the fastest way to access it. So the delivery of data is very quick. The performance also increases if the cache is able to guess the data for the process before and can readily send it.

**Comment for any further queries.

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