Operating System (OS)
Supervisor state is

only allowed to the operating system
required to perform any I/O
entered by programs when they enter the processor
None of these
never used

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Operating System (OS)
System maintenance:

None of these
is not required if the system is well written
always requires several programs
is necessary on all systems, regardless of how good
is usually not necessary

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Operating System (OS)
What hole will allocates in "Worst-Fit" algorithm of memory management?

It allocates the largest hole from the available memory holes
It allocates the smallest hole from the available memory holes
It allocates the smaller hole than required memory hole
It allocates the exact same size memory hole

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