Cache memory:

Central processing unit (CPU) uses the cache memory to decrease the average cost to access the data from the main memory.

It is smaller in size and is faster as it stores the copies of data from the frequently used main memory locations.

It is located very close to CPU and allows faster operations without consuming much time.

This organizes all the data cache in a hierarchy of more cache levels and they are L1, L2, L3, and L4...

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Solution Summary: The author explains the use of cache memory by the central processing unit (CPU) to decrease the average cost to access the data from the main memory.

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