Operating System (OS)
The ability of an operating system to control the activities of multiple program at the same time is called

Multitasking
Multioperating
Multiprocessing
Multipaging

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Operating System (OS)
File record length

depends upon the size of the file
should always be fixed
should be chosen to match the data characteristics
Should always be variable
None of these

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Operating System (OS)
Thrashing

is a natural consequence of virtual memory systems
can be caused by poor paging algorithms
always occurs on large computers
None of these
can always be avoided by swapping

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