Question

In a computer, we have primary memory that accesses the processor directly and secondary memory for permanent storage of data. Then why do we need cache memory? Explain in detail.

Answer 1

Answer:

The purpose of cache memory is to store program instructions and data that are used repeatedly in the operation of programs or information that the CPU is likely to need next. The computer processor can access this information quickly from the cache rather than having to get it from computer's main memory.

Answer 2

Answer:

Cache memory is important because it provides data to a CPU faster than main memory, which increases the processor's speed. The alternative is to get the data from RAM, or random access memory, which is much slower. Cache memory is also often called CPU memory and it is usually physically located on the CPU.

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