Question

Which writing mechanism forms the backbone of the bus snooping mechanism?

(a) write-back

(b) write-through

(c) no caching of write cycles

(d) write buffer

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

The question is from Writing Scheme of Cache Memory in division Memory Systems of Embedded Systems

Answer 1

The correct choice is (c) no caching of write cycles

The explanation: The no caching of write cycle seems to be wasteful because it does not update the cache, and if any previous data is cached, that entry might be an error and is not used. So the processor access data from the main memory but this writing scheme forms the backbone of the bus snooping system for the coherency issue.