UGC-NET | UGC NET CS 2016 July – III | Question 6

In _____ method, the word is written to the block in both the cache and main memory, in parallel.
(A) Write through
(B) Write back
(C) Write protected
(D) Direct mapping


Answer: (A)

Explanation: In write through method, the word is written to the block in both the cache and main memory, in parallel and in write back method the word is written to the block in cache but actual update into the corresponding location in main memory only at specified intervals or under certain conditions.
In Write Protected cache policy word cannot be modified or deleted.
In direct mapping block M of main memory maps into block M modulo n of the cache, where n is the total number of blocks in cache.
So, option (A) is correct.

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