Operating System (OS)
Addressing structure

defines the fundamental method of determining effective operand addresses
All of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
None of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.

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Operating System (OS)
You should choose sleep option when

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

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