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

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

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Operating System (OS)
Thrashing

always occurs on large computers
can be caused by poor paging algorithms
is a natural consequence of virtual memory systems
None of these
can always be avoided by swapping

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