A lot of people find this subject boring but honestly I thought it was really interesting and fairly straightforward. The crux of the course involves challenging decisions of the executive and involves a lot of political tussling between the Courts and the Executive, which leads to some interesting policy issues. The course is structured a little bit back to front but ultimately you will learn about the main steps for seeking judicial or merits review of administrative decisions (e.g. decisions made by government bodies and specialist tribunals such as the Refugee Review Tribunal). It is more interesting than it sounds.
The exam involves a lot of statutory interpretation and will require you to read up on a short piece of legislation beforehand. Make sure you know it back to front before going into the exam. Unfortunately, because each exam is tailored to its particular legislation, it is difficult to do practice exams (as you won't have the legislation from those years).
Finally if you are interested in administrative law then I recommend taking part in the
Administrative Appeals Tribunal moot which will give you practical insight into how merits review is conducted. It is also a very well run competition.