What is a memory cache-non-inclusive?

What is a memory cache-non-inclusive?

A memory cache-non-inclusive is a type of cache organization where the cache does not contain a copy of every block present in the main memory. In this organization, if a block is present in the cache, it may or may not be present in the main memory. This means that the cache does not have exclusive control over the blocks it contains, and modifications made to a block in the cache may not be reflected in the main memory.