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Explain the difference between write through and write back cache?
Write Through : After writing in cache memory, main memory is updated too immediately to maintain reliability.
Write Back : After writing in cache memory a flag bit called dirty bit is set.
When this value need to be replaced that bit is check, if it is set then the value is taken to main memory.
Write Back : After writing in cache memory a flag bit called dirty bit is set.
When this value need to be replaced that bit is check, if it is set then the value is taken to main memory.