As long as you have prepared somewhat then it will be fine I found that the questions themselves are not tricky, it's the time constraints that were the challenge- so make sure you are confident in working things out really fast! The ones I was unsure of I left and then went back to if I had the time and made an educated guess, if you dwell on one you may miss out on marks as there could be questions further on that you don't have time to answer, but you would have gotten right. Good luck!
It's exactly as Litelite described it. The questions are easy, it's just getting them in the time limit. But as long as you have some common sense you should pass! Just make sure you make an educated guess on the ones you don't know, which is what I did in mine. Good luck!