Question

Dirty bit is used to show
A. Page with corrupted data
B. Wrong page in memory
C. Page that is modified after being loaded in the cache memory
D. page that is less frequently accessed

Answer 1

$\huge\red{Answer}$

C. Page that is modified after being loaded in the cache memory

HOPE IT HELPS YOU !!

Answer 2

Answer:

C. Page that is modified after being loaded in the cache memory

Dirty bit is used to show Page that is modified after being loaded in the cache memory.

Explanation:

Dirty bit: A dirty bit is used to display a page that has been modified after being loaded into cache memory. It is connected to a block of cache memory. The dirty bit idea is applied during write back policing in cache.

• Updates that are written back only affect the cache. When a line is edited, its dirty bit is set, and if that line is chosen for replacement, only if that line's filthy bit is set does that line need to be written to main memory.
• To update the memory during a write-back, we first write the cache copy. If we only write when cache data differs from memory, the number of write backs can be decreased.
• By using a dirty bit or altering bit, it is done. Only when the dirty bit is set to 1 does it write back to the cache. As a result, the write back cache needs two bits: a valid bit and a dirty bit.
• The dirty bit is used to display modified pages that have been loaded into the cache memory.