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When does a page fault occur in paged virtual memory?

Answer and explanation

Correct answer: When the required memory page is not present in main memory

The governing concept is demand paging. A page fault occurs when a running process refers to a virtual-memory page whose contents are not currently in physical main memory. The operating system pauses the process, locates the page in secondary storage, loads it into an available frame, and updates the page information before retrying the instruction. Therefore option B is correct; the other choices concern unrelated devices or names.

Related tags

IctPage-FaultVirtual-MemoryUsing An Operating System And File ManagementIct (Information & Communication Technology) Skills IIct Information Communication Technology Skills IArtificial IntelligenceClass 9 Mcq

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