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When the valid bit is set to 1 in a cache, it indicates that the corresponding cache line contains valid data that can be used for access. This means that any request for data associated with that cache line will result in a hit, as the data is guaranteed to be valid. For example, if a CPU requests data and the cache line's valid bit is 1, the cache returns the data directly from that line, confirming a cache hit. Conversely, if the valid bit were 0, it would signify that the data is invalid or not present, leading to a miss.

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1w ago

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