Operating System (OS)
You should choose sleep option when

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

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Operating System (OS)
Addressing modes

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

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Operating System (OS)
What is the meaning of "Hibernate" in Windows XP/Windows 7?

Restart the Computer in hibernate mode
Restart the Computer in safe mode
Shutdown the Computer terminating all the running applications
Shutdown the Computer without closing the running applications

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