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

halts for a predetermined time
hands over control of address bus and data bus to the interrupting device
None of these
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)
What is dispatch latency ?

The time taken by the processor to write a file into disk
The time taken by the dispatcher to stop one process and start another
None of the listed here
The whole time taken by all processor

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