I heard in real exam, it would mention the correct number of answer to choose. Such as 'Choose 4 correct answers' instead 'Choose all apply'. Which make lot easier, I think !
As Mohammad Khan said there will be hint saying how may answers we have to choose,that makes exam easy and i felt questions also not as tough as Master Exam they were OK.Generally we take mock exams in normal environment where we get disturbed frequently, but exam environment will be silent so you can concentrate more and can get good marks.
SCJP 1.5 94%.
The greatest glory in living lies not in never falling, but in rising every time we fall.
The master exam and real exam are quite similar. The pass percentage on the master exam is unrealistic and some questions are buggy. Otherwise they are on par.