Hi, I have just completed part 2 of the certification and needed some help on part 3. I have to say i found part 2 difficult as i'm used to lowlevel design and kept getting down to little design details that weren't important. I'm worried about doing the same for part 3 so need to know what the questions look like. Are they like " describe how your suggested architecture provides security/transactions"? why did you use pattern x? do we have any reference material in the exam?