Operating System (OS)
Addressing modes

are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
None of these
All of these
defines the fundamental method of determining effective operand addresses
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 finish working and going to bed
You are leaving for a very short time and want to resume you work shortly
When computer gets hanged frequently. Let it sleep for some time
The computer is tired after working for the whole day

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