Dificult questions for me were the ones about the "Structure and development of web application" very ambigous answers, especially about the war files. 5 questions about design patterns but very easy.Other than that no problems, plenty of time I had another hour left when I finished last question. I read "head first.." about a month ago and have not studied since than. I started preparing about a week before the exam 3 hours a day, first I took the exam at the end of the book scoring around 60% than I focused on the questions I failed. Day before the exam I reviewed and tried to memorize some APIs and dd elements.