The meaning is to LEARN stuff and not about memorizing QB.
QB is a great tool to check where you need to study more. And to answer few of those tricky questions. However, if you DO study, you will pass the exam, no matter how many new questions they make.
My advice - donīt waste 6 months memorizing "a" or "b". You may pass the exam now. But what will you answer on tech interview, when asked to explain how ILS works?