What does the processor generally do when required data is not found in cache?

Correct answer: It fetches the data from slower main memory or storage

The governing concept is the memory hierarchy and a cache miss. If the requested item is absent from cache, the processor or memory system looks in the next lower, larger and slower level, normally main memory; if necessary, storage is consulted through the operating system. Therefore option C is correct. A cache miss does not shut down the computer, involve a printer, or rename a file.