The cache coherence problem can be solved

A. by having multiport memory

B. allow only nonshared data to be stored in cache

C. using a snoopy cache controller

D. using memory interleaving

Choose the correct answer from the options given below:

Cache coherence problem occurs when multiple caches contain copies of shared data.

Allowing only nonshared data in cache avoids the coherence problem.

So, statement B is correct.

Snoopy cache controller monitors bus transactions and maintains consistency among caches.

So, statement C is correct.

Multiport memory improves simultaneous access, but it does not directly solve cache coherence.

Memory interleaving improves memory access speed, but it does not solve cache coherence.

Therefore, B and C only are correct.