The more you know, the better your score will be (probably).
I have a quite good knowledge of the Servlet API and I hope that this will help me to get a good score.
If you know all the methods of the HttpSession interface, you will not have any doubts if they use in the exam the method session.setDestroyTime(). Is this a method that doesn't exist or is it a method that you don't know?
In my opinion, it is not a question of learning all of them by heart but use them and build a good class diagram with (almost) all of them and with the more relevant ones in the first places.
Cheers, Jose [ April 05, 2005: Message edited by: Jose Esteban ]
Like Jose says it wouldn't do you any harm to learn them but I wouldn't go doing any all nighters staring at pages in the hopes they go into your head. Write, write, write!!! It's just like any language, the more you practice the more it just becomes second nature and the less likely you will be caught out on the exam.
And when you develop you won't need to keep running to the API all the time.