Find the areas where you think you think you might struggle finding the right answer.
QlikView 11 System Administrator Certification | Qlik - and then read the manual (ALWAYS!) It worked for me.
In general i will recommend that you read through the manual (I know it is trivial, but it really helps and you can probably skip half of the pages anyway). If you do that, you will have a pretty fair chance of passing the exam, if you also have some hands on experience.