Gen. Q. about updating

Does the Quest need to be on or can it be in sleep mode or off to be updated, like if I'm not home.

Does the link cable need to be plugged in?  Does the app need to be open, or can I leave it closed?

When you are not using our Quest, how do you store it?

I leave mine upside down on my game table.  Does it matter when my Quest is told to update buy

the system?

I have everything turned on to self-update.