Operating System (OS)
The main function of the dispatcher (the portion of the process scheduler) is

assigning ready process to the CPU
bring processes from the disk to the main memory
suspending some of the processes when the CPU load is high
swapping a process to the disk
None of these

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Operating System (OS)
You should choose sleep option when

The computer is tired after working for the whole day
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

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