Purpose of Using Cache Memory

Q1. Explain the purpose of using Cache Memory.

Ans. Information is normally kept in some storage system such as main memory. As it is used, it is copied into a faster storage system—the cache—on a temporary basis. When we need a particular piece of information, we first check whether it is in the cache. If it is, we use the information directly from the cache; if it is not, we use the information from the source, putting a copy in the cache under the assumption that we will need it again soon.

 

In addition, internal programmable registers, such as index registers, provide a high-speed cache for main memory.

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