As far as I can remember, I did have a question or so on the dynamic attributes topic in my SCWCD exam, as well as in the mock exams that I had used.
Look at a few examples, then probably the topic will seem easier.
SCBCD5, SCWCD5, SCJP5
"Even if you're on the right track, you'll get run over if you just sit there."
I can't remember dynamic attributes, but I did find questions about jsp:attribute a few times. You can use the latter without dynamic attributes though.