Operating System (OS)
Data encryption

is not necessary, since data cannot be intercepted
cannot be used by private installations
None of these
is mostly used by financial networks
is mostly used by public networks

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Operating System (OS)
Virtual Memory

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

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Operating System (OS)
A relocate program form is one which

consists of a program and relevant information for its relocation.
cannot be made to execute in any area of storage other than the one designated for it at the time of its coding or translation.
None of these
All of these
can itself performs the relocation of its address-sensitive portions.

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Operating System (OS)
What is dispatch latency ?

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

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