1 and 2 above. Yes. 3 (no idea)
Plus feeback you get from which ever school you go to and other questions in your course notes plus the course notes you might borrow from another school (ie the OAT notes) plus those little books you can buy with Q's in like Pooleys but they get a bit dated quick.
The sum of all three will give you a pretty give view of likely q's in the objective questions for most subjects (about 10,000 in all..)
h-r