Qualifications don't come into it.
Guesswork, pure guesswork on the theory.
You might know the subject inside out but once you are in the exam hall the questions wont make any sense anyway. Designed to catch you out you see, more money for the CAA.
You could always bribe a member of FCL, apparantly it was going on a few years ago till they were found out.
Otherwise, good luck with the multi-guess "Pepsi-Challenge"