For the question regarding parliament cannot override decisions made by the supreme court isnt that correct? because parliament can only override laws or interpretation made by the courts. And didnt the question say overide decision? i thought that due to the seperation of powers, parliaments cannot change a courts decision on a sentence through legislation however can pass a new legislation for that area? that question confused the hell out of me 
The question was "Parliament cannot make laws that override decisions made by the Supreme Court of Victoria" - is this statement correct or incorrect?
The only time parliament
cannot make laws that override decisions made by courts is when interpretation of the Commonwealth Constitution by the High Court takes place. This, I thought, was worth mentioning (even though the question specifically related to the Supreme Court of Victoria), because apart from that, parliament
can make law to override any decisions made by the Supreme Court of Victoria (i.e. abrogation) as, ultimately, they are the supreme law making body in Australia. Therefore the statement in the question was incorrect. I was having trouble deciding whether to chuck in the Trigwell case to accentuate my point, but I didn't put it in as I wasn't sure if it was a case heard by the Supreme Court of Victoria.
I think this question threw some people because it related specifically to the Supreme Court of Victoria, where most people would've rehearsed this question with reference to courts in general, prior to the exam. However, the fact it was referring to one particular court shouldn't have really changed answers all too much, but it could have thrown students given the exam conditions.
All your logic is there, but I just think you misread the question. You're right in saying that parliament can't necessarily overturn a decision reached in a trial at hand, but they can definitely override the decision in terms of passing legislation that suggests the opposite to the court's decision (I think that's right, I never really studied that part of the course in detail).