No because I suck so much that even if I knew exactly what was in the paper, i'd still give crappy answers.
It's like in English.
I have yet to write a complete, satisfactory essay.
Actually, for the trials, I knew my teacher was gonna use the Independent papers for computing studies, and I did have a look at what other people were saying about the tests, because we didn't do it on the day, and I did happen to know that there was going to be a deskchecking question, and a question that asks you to write an algorithm to generate a random password.
DId it matter? No, just because you know what's in the test, doesn't mean that you'll write a good asnwers, especially if it's one of those crappy subjects like Eglish where what the marker wants is ambigious.