Well, I took the
test (I assume you're taking 406 - WAS Standard Edition) a little over a month ago, so....
Actually, I found it wasn't horrible, and I probably would have done better if I hadn't made myself so nervous. (I was having a very bad morning when I arrived to sit for my exam, and suffice it to say, the situation wasn't ideal. That, and the testing center that my company tends to use isn't the most wonderful.)
About 60% of my examination had to do with application development and wasn't necessarily WebSphere-specific but more related to
JSP's and
Servlets. I cannot stress enough that it is important to know those API's. The remainder ended up being on configuration, deployment and troubleshooting of WAS, most of which is fairly straight forward, and easier if you've taken time to practice it.
Best of luck on your exam! (And on studying for 486 - I'm doing the same now, ugh!)
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Theodore Jonathan Casser
Sun Certified Programmer for the Java2 Platform
IBM Certified Specialist - WebSphere Application Server, Std. Ed, V3.5