Operating System (OS)
The term "operating system" means

the way a floppy disk drive operates
a set of programs which controls computer working
conversion of high level language into machine code
None of these
the way a computer operator works

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Operating System (OS)
Thrashing

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

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