Operating System (OS)
The CPU, after receiving an interrupt from an I/O device

None of these
branches off to the interrupt service routine after completion of the current instruction
halts for a predetermined time
branches off to the interrupt service routine immediately
hands over control of address bus and data bus to the interrupting device

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Operating System (OS)
A page fault

is a reference to a page belonging to another program
None of these
is an access to a page not currently in memory
is an error is a specific page
occurs when a program accesses a page of memory

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