Answer / sudeep

This is cache write hit policy,
1. write through:- The information is written to both the
cache and the main memory upon a hit,
2. write back:- The inforamtion is written to only cache,
the main memory is updated upon a read miss.

Answer / achal ubbott

1. Write Through policy is relatively slower. but offers
advantage of coherence between cache and main memory.

2. Write Back is faster and frquently used. It makes use of
Dirty bit. If the data in cache is not in coherence with
one in main memory then Dirty bit is set.

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