Not sure what you mean about 1's and 2's.
You are just better off just knowing the subject. The pass mark is 80% (it was when I did it) so that means you must know it.
The questions can be tricky.
There was a small company that were selling tags for all your documents ( AIP, CAO's and CAR's etc). These tags were fantastic. They made it easy to find references during the exam. They are CASA approved.
Ash
