Question

Which cache memory solve the cache coherency problem?

(a) physical cache

(b) logical cache

(c) unified cache

(d) harvard cache

The question was posed to me during a job interview.

The question is from Size of Cache in portion Memory Systems of Embedded Systems

Answer 1

Correct answer is (a) physical cache

To explain: The physical cache is more efficient and can provide the cache coherency problem solved and MMU delay is kept to a minimum. PowerPC is an example for this advantage.