hi, i'm doing it, i'm in my last year of doing it now. for the first year exam with the pre-release, our teachers went through it with us and tried to come up with questions based on the pre release. I don't know if its the same, but ours had like a lot of data stuff in it, so we worked on interpreting the data and drawing graphs from some of the data on there. also it's usually based on a topic from the spec so i would say just revise that topic in detail and make sure you know it really well. you also get the pre-release in the exam i think, so it's not too bad. hope that helps !