Operating System (OS)
Sleep is a good mode to use because

It consumes low battery when you start it again
It saves power which in true is saving money
It makes computer fresh after it wakes up
All of the listed here

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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
You are leaving for a very short time and want to resume you work shortly
The computer is tired after working for the whole day

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Operating System (OS)
The dispatcher

actually schedules the tasks into the processor
is always small and simple
never changes task priorities
puts tasks in I/O wait
None of these

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