Operating System (OS)
Backups should be done

weekly for most installations
as several incrementals, followed by an image copy
None of these
as several image copies, followed by an incremental
daily for most installations

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

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