Basically, as long as you've done enough work, you'll be ok. You have to do so much research though, especially on culture and how its influenced your work. Has your teacher gone through the criteria with you?
I think I must be the only person to have taken my art exam so far on here.
I found it easy, but then I have worked myself practically to death over it. I filled 3 hardback sketchbooks and did a major amount of studio work. If I havent got a high 6/7, I'll be pretty angry.