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

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

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Operating System (OS)
Backups should be done

weekly for most installations
None of these
as several incrementals, followed by an image copy
daily for most installations
as several image copies, followed by an incremental

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Operating System (OS)
The instruction register

is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
None of these
contains the address of the memory location that is to be read from or stored into.
is a hardware memory device which denotes the location of the current instruction being executed.

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