Operating System (OS)
A page fault occurs when

the Deadlock happens
the page is found in the memory
the Segmentation starts
the page is not found in the memory

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Operating System (OS)
Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

they are memory resident
None of these
they are partly in primary memory and partly on disk
they are initially stored on disk
they are available on magnetic tapes

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