Last week I did SCDJWS 5 beta exam. I think my grade was not very good, since that, actually, I don't work with web services so much. So, I didn't spend too much time on the exam, and after 3 hours (the exam gives you 4) I decided to quit. I think this test was very difficult even for people who work with Web Services everyday. Many of the questions demanded knowledge of specific APIs.
But I noticed a point on the exam where I found a bug: one of the questions was saying that you had to choose 2 alternatives, but when you choose to see the revision board (to check if you answered all the questions), it was saying that the answer was incomplete. I chose 3 alternatives and the revision board stopped claiming. So, I completed the test without knowing which was the right way to do with that question