In the MESI protocol, if a cache line is in the 'E' (Exclusive) state, what can the cache do without informing other caches?
The Exclusive (E) state signifies that the cache line contains an unmodified copy of the data, and this cache is the only one holding a copy (it is exclusive). Since no other cache has a copy, the local cache can modify the data internally and change the state to 'M' (Modified) without notifying or invalidating any other cache, which is a key performance optimization.
