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

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
halts for a predetermined time
None of these
branches off to the interrupt service routine immediately

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Operating System (OS)
Virtual Memory

is a method of allocating processor time.
consists of those addresses that may be generated by a processor during execution of a computation.
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
None of these
allows multiple programs to reside in separate areas of core at the time.

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