I am also perparing for the Exam...If u r new to Jsp and Servlets(I assume u dont have prior experience)..you can buy More Servlets and Javaserver Pages book.
Then you can go through the servlet2.3 and Jsp1.2 specifications that comes from Sun..
You have to know about all the elements of web.xml file and TLD file..
You can get the various design patterns from sun home page..
Once you are ready..u can take various mock exams at javaranch.. http://www.javaranch.com/scwcdlinks.jsp
[ August 10, 2002: Message edited by: umar hathab ]