Operating System (OS)
Thrashing

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

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Operating System (OS)
Memory management is :

not used on multiprogramming systems
not used in modern operating system
replaced with virtual memory on current systems
critical for even the simplest operating systems
None of these

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Operating System (OS)
File record length

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

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