Computing systems need cache because
A) accessing main memory is slow and cache speeds it up.
B) register access is slow and cache speeds it up.
C) main memory is expensive and cache offsets the cost.
D) All of the about.

Question

Quizplus · Accepted Answer

Computing systems need cache because accessing main memory is much slower than accessing cache memory. Cache memory helps in speeding up the data access time for the processor, allowing it to quickly retrieve and store frequently used data. Register access is also fast, but cache memory is still needed to bridge the gap between slow main memory and fast registers. The cost of main memory is not the sole reason for cache; cache is primarily used to improve system performance.

Computing Systems Need Cache Because