To use cache memory main memory are divided into cache lines typically 32 or 64 bytes long. an entire cache line is cached at once what is the advantage of caching an entire line instead of single byte or word at a time?

The advantage of caching an entire line in the main memory instead of a single byte or word at a time is to avoid cache pollution from used data

Explanation:

The major advantage of caching an entire line instead of single byte is to reduce the excess cache from used data and also to take advantage of the principle of spatial locality.

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