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

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

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Operating System (OS)
System generation:

is always quite simple
is always very difficult
None of these
requires extensive tools to be understandable
varies in difficulty between systems

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Operating System (OS)
Scheduling is

unrelated to performance consideration
allowing jobs to use the processor
None of these
not required in uniprocessor systems
the same regard-less of the purpose of the system

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