What is cache memory ?
A cache memory is a small and very fast memory .It is designed to speed up the transfer of data and instruction .It is faster than RAM.The data and instruction that are most recently used by cpu are stored in cache memory .
The data and instruction are retrieved from RAM when cpu uses them for first time .A copy of that data is stored in cache .The next time the cpu needs that data or instruction ,it looks first in cache .If the required data is found there ,it is retrieved from cache memory instead of main memory .It speed up the working of cpu.
The cache memory is used every computer to speed up the working of cpu. It brings data for cpu to search any part of the cpu.
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