I've taken a few of the WebSphere exams for prior versions. I've found the best way to pass the test, honestly, are to read IBM's Redbooks and to take the time to use the product. They don't tend to write them too hard, but they do seem to depend on having had experience with their applications.
Theodore Jonathan Casser
SCJP/SCSNI/SCBCD/SCWCD/SCDJWS/SCMAD/SCEA/MCTS/MCPD... and so many more letters than you can shake a stick at!
A teeny tiny vulgar attempt to get you to buy our stuff