Question

In which scheme does the data write via a buffer to the main memory?

(a) write buffer

(b) write-back

(c) write-through

(d) no caching of the write cycle

This question was addressed to me by my college director while I was bunking the class.

Origin of the question is Writing Scheme of Cache Memory topic in chapter Memory Systems of Embedded Systems

Answer 1

Correct choice is (a) write buffer

For explanation I would say: The write-buffer is slightly similar to the write-through mechanism in which data is written to the main memory but in write buffer mechanism data writes to the main memory via a buffer.