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Computer Architecture & Organization
Q82 / 100
What is the "MESI" cache coherence protocol, and what do its four states represent?
Correct! Well done.
Incorrect.
The correct answer is A) MESI stands for Modified, Exclusive, Shared, Invalid — these states describe whether a cache line is uniquely modified by one cache, exclusively held but unmodified, shared (read-only) across multiple caches, or invalid (not usable)
A
Correct Answer
MESI stands for Modified, Exclusive, Shared, Invalid — these states describe whether a cache line is uniquely modified by one cache, exclusively held but unmodified, shared (read-only) across multiple caches, or invalid (not usable)
Explanation
MESI is a widely used cache coherence protocol where each cache line is tagged with one of four states, governing how reads and writes propagate between caches to maintain a consistent view of memory across cores.
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82/100