Question

What are the basic elements required for cache operation?

(a) memory array, multivibrator, counter

(b) memory array, comparator, counter

(c) memory array, trigger circuit, a comparator

(d) memory array, comparator, CPU

I have been asked this question by my college director while I was bunking the class.

I'm obligated to ask this question of Cache Memory in division Memory Systems of Embedded Systems

Answer 1

Correct answer is (b) memory array, comparator, counter

To explain: The cache memory operation is based on the address tag, that is, the processor generates the address which is provided to the cache and this cache stores its data with an address tag. The tag is compared with the address, if they did not match, the next tag is checked. If they match, a cache hit occurs, the data is passed to the processor. So the basic elements required is a memory array, comparator, and a counter.