Haha true,I dont think pure guessing will net 25% of overall results, maybe the person just pick only B for all the questions but that will surely make him failed the test, I think someone with 45% correct in this exam clearly shows a masters of knowledge, especially those questions which require lots of thinking in 2 minutes!
When I was doing the mock exam, I can eliminate 2-3 answers for each question but in the exam day, I can only eliminate 1-2 answers for each question