Question

Which statement is true for a cache memory?

(a) memory unit which communicates directly with the CPU

(b) provides backup storage

(c) a very high-speed memory to increase the speed of the processor

(d) secondary storage

This question was addressed to me during a job interview.

The question is from Memory Organisation of Embedded Systems in division Memory Systems of Embedded Systems

Answer 1

Correct answer is (c) a very high-speed memory to increase the speed of the processor

The best explanation: The RAM is the primary storage which directly communicates with the CPU. ROM is the secondary storage. Disk drives are capable of providing backup storage and the cache memory is a small high-speed memory which increases the speed of the processor.