I just wrote my Oracle Certified Expert Exam on Java Web Components(JSP's and Servlets) and i passed with 82% score.
Many thanks to
1. Head First SCWCD by Katty and Bates
2. The Servet and JSP Specifications(3.1 and 2.2 versions respectively)
3. Enthuware Mock exam(saw very similar questions on the exam)
4. I found this link useful: piotrnowicki
And of course the kind fellows at coderanch,garnered so much insight here!