Not sure about the Australian license exams, but in the USA, each license class consists of something like 50 questions pulled from a pool of something like 300 questions.
Some prospective hams never learn the theory behind the questions, but just learn the questions. Questions and answers are always exactly the same. If it’s a multiple choice and answer is C, then the answer to that question is always C.
There are online practice tests that are helpful. You take a few online tests and soon figure out where you need to study.
So, maybe there are similar practice tests in Australia. I suspect if the girl in the pic needed help studying for the exam, there would be lots of volunteers. That’s from Last Man Standing? Funny show, and showcased ham radio positively on a few episodes.