To the OP, think back in your A-level days (or whatever the equivalent is for school leaving exams in your country), did your teachers tell you that "everything that will be in the exams is in your textbooks". While that statement is technically correct, you didnt only study off of your textbooks. There were homework, class notes, quizzes, prior year/semester exam paper, work books, etc....They are just like the QB in this monster ATPL. No shame in using it if it helps. Ask me how much I remember from my A-level, how much of that stuff I have used in the "real world"... the answer is not much! But that doesn't mean A-level was completely useless. It's a hurdle to jump thru to get a school leaving certificate. It would be tough to get your first job with bad grades.
Your learning wont stop just because you get thru these exams either.