I got my certification about 7 years (I actually re-upped today), so not sure how much has changed in the course, but when I took it the test, it was 200 questions and you have to get 140 correct to pass (which was not easy).
Basically, throw out what you do every day and learn the book that were mentioned. What you do on a daily basis is usually curved to the world you live in, while the exam is straight by the book. For credits, you can count your job for X amount of credits and you can also pretty much count any class you take at work (ethics, export compliance, process, ITIL, etc).