Well...looks like the new exam
really requires more time to complete because you will have to read through lines and lines of code. Your experience in doing Mock exams may not help much
Don't get browned off. Develop some strategies for optimising your time like using method of elimination to improve your chances of guessing, trying to identify compiler errors first( if it happens to be one of the answer ) and so on. I am sure you will make it through the next time.
Ofcourse, if you have any questions, ask in Javaranch
Good luck,
Ajith