Operating System (OS)
The Memory Address Register

None of these
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".
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.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.

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Operating System (OS)
You should choose sleep option when

When computer gets hanged frequently. Let it sleep for some time
You finish working and going to bed
The computer is tired after working for the whole day
You are leaving for a very short time and want to resume you work shortly

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Operating System (OS)
A page fault

is an error is a specific page
is an access to a page not currently in memory
is a reference to a page belonging to another program
occurs when a program accesses a page of memory
None of these

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