Operating System (OS)
Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

they are memory resident
they are available on magnetic tapes
they are partly in primary memory and partly on disk
they are initially stored on disk
None of these

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Operating System (OS)
Paging

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.
allows multiple programs to reside in separate areas of core at the time.
is a method of allocating processor time.
None of these
consists of those addresses that may be generated by a processor during execution of a computation.

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Operating System (OS)
What is the method of handling deadlocks?

Use a protocol to ensure that the system will never enter a deadlock state
Pretend that deadlocks never occur in the system
All of these
Allow the system to enter the deadlock state and then recover

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