Standing at the other side of AeSI, I can tell you students out there. Hang in there. Yes its frustrating, the examination and the results most of the time do not match. Sometimes questions that came are not meant for exams, Sometime 80% of the questions are coming form a single topic, or sometime the question requires a long explanation but has only tiny marks are allocated to it.
Sometimes the questions are just the repeat of the last semester questions. Sometimes its just the combination of 2 or 3 papers question picked and juggled and sometimes its entirely new in pattern and topics selected.
Studying does make you tackle all this but what is needed is the mental discipline, mental effort to see through the surprise.
Natrajan Sir once explained the best way to tackle this is to keep yourself prepared. expect to be surprised then only you won’t be surprised. One gets surprised only when he/she is too concentrated on the examination papers and shuns the syllabus book. So the best strategy is to begin with the syllabus book, then as you progress in your studies get question papers onboard.
Question papers are to give you a familiarity of the exams, they are there to check yourself on your preparation. Don’t fix too much on the question paper and the pattern, don’t study based on what question papers seem to suggest, study according to the syllabus book.