It is an interesting question (so I up-voted it), but they are not conflicting since it doesn't happen at the some.
I don't think it is really food deprivation - any healthy human being should be able to go 16 hours between meals once in a while (assuming regular meals most of the time). When you wake up you do wake up hungry, but you don't feel impaired yet.
Food deprivation may start after that - so you might get lethargic and sleepy because of it.
It seems more like "Having food in you keeps you awake" - so a big breakfast will keep you running until the afternoon, and an early dinner will mean the tanks less full when you want to sleep.
Have a full breakfast to avoid sleeping during the day
Those 2 facts seem conflicting to me. In one case food deprivation helps you wake up while the other case it would make you feel asleep?