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Question
When does a Page fault occur?
Options:
A .  A program accesses a page of main memory
B .  There is an error in a specific page
C .  A program accesses a page not currently in the main memory
D .  A program accesses a page belonging to another program
Answer: Option C
Answer: (c)
When the page (data) requested by a program is not available in the memory, it is called a page fault.
It occurs when a program accesses a page that has been mapped in address space but has not been loaded in its main memory (RAM). This usually results in the application being shut down.

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