I think, you ca do some of the following in the next two days...
1. List out all the DD elements and study 3 to 4 times... (some examples web.xml with all elments filled with data, for clarity, you can write comments on what it will do)
2. List out all the
JSP element Syntax, JSTL tags, Custom tags and try to remember all the tags including the return values of the tag handlers.
3. Try to answer the questions in this forum...
4. If you still have time, write one sample program which covers all the demo code in HFSJ & whatever the book you have read, and try to remember the entire flow
5. Finally & the most important one, sleep wellllll before the exam......