Discussion
What is the primary purpose of cache memory in a computer system?
Answer: B
Cache memory exists to store frequently accessed data for faster retrieval.
Cache is a small, very fast memory placed between the processor and main memory (RAM). It keeps copies of the instructions and data the processor is likely to use again soon, so that most requests can be served without waiting for the slower main memory. This reduces the average memory access time.
Cache is volatile and tiny, so it cannot act as permanent storage for user files, which is the job of secondary storage such as disks. It does not replace main memory or secondary memory when they fill up; virtual memory and storage management deal with that.
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