Question

while using a write back cache, which of the following policies needs to be abided

A Write Allocate

B. No Write Allocate

C. Write Around

D.Write through

Answer 1

The write Allocate needs to be abided while using the write-back cache.

Option: A

Explanation:

• The write-back cache makes use of the write allocate so that the data in those blocks can be captured by the cache.  

• The write-back is a method of storage where the date is written in the cache when there is a change.  

• When the location of data is updated in the write-back mode then the corresponding data is called fresh.  

• The data is written in the main memory only during specific periods or due to certain conditions.  

• When the data in the ‘main memory’ does not match with data in the cache is termed as stale.

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