If they got hungry don't you think they would eat? LOL
Seriously though, they are made to endure long periods of not finding prey in the wild, or not finding their enviroment conditions right for hunting and eating. They must be able to oulast in the wild.
All snakes can fast. Even cornsnakes can go quite some time without eating and come through with flying colors. I know of someone who has one who went almost a year over on Rich Z's forum.
I am sure you'll get more detailed, specific answers from the smart guys/gals out there!
Marisa