The test I took included plenty of questions about EDD design, as well as structured applications. All the questions on the test were reasonably detailed and would be very difficult to answer without close experience with the product. You might be able to get by with a class, but nothing will substitute for sitting down and learning EDDs by building them. There were some questions that were just weird little things that you would only know if you used the product regularly.
Best of luck with the test,