The main part of the exam is the written test, it will decide whether you survive or not. If you survive it (see the rules in the syllabus), you can try to improve your grade at an oral exam. There we talk about theory and the aim is to determine how well the students familiarized hm/herself with mathematics, which is done best by asking to prove some statement. So expect proofs. The oral exam will most likely take place on the same day as the written test, it will be announced during the written test. Do not leave the room unless you know where and when the results and oral exam will take place.
It will consist of four basic problems that cover the major topics, one abstract proof, a few question of middlish impact and several "one-biters" (aka "canape"), simple questions that (if you know the stuff) can be answered fairly quickly. For more details see the sample final.
When going to the exam, bring along some papers (2 to 4 sheets of A4 size usually suffice) and one double-sheet (tear it out of an A4 exercise book) that will serve as a cover for your work when you hand it in. On the outer side you write your name and a draw small table for writing points:
Please do not use checkered papers, and if you really have to for some
reason, then use a different ink to write on it, but please no red.
Do not permute the order of problems and if you solve put more problems on one sheet, separate them visually in some prominent way. If the examiner cannot find your answer to some problem, you get zero points.
The recommendation how to prepare best is obvious: Solve lots of problem of appropriate type and while solving them, think about what you do and why.