1. Yes. There's no reason why you should not. 2. Yes. But you'll have to read at least something about Dynamic Attributes and J2EE Patterns. Refer to the SCWCD links. 3. The number is not defined. You'll get some. Even if you knew how much questions there are, it wouldn't make any difference Just be careful that your previous answer will be resetted if you review a drag and drop question.