There are at least two written tests given when going through ground school. The first is indoc/ops specs. You fail, some airlines say goodbye right there. Lots of 121 regs and company regs. Three things you need to do at this stage of the game is study, study and study. The second is a systems test. I suggest you study your limitations right off the bat. Speeds, temps, pressures, atlitude limits. Those kind of things. Learn what every light means when it comes on. Again, study, study, study.

Then comes an oral evaluation. You will get senario type stuff here. This is where the ops spec and the systems get pulled together in one test and they make you think on the fly(pun intended). Example: You fly this many hours and your are on duty this long. How long will rest be? Can it be reduced? Things like that.

Make it through that stuff and it is on to the sim. Studying will only get you so far. Have your memory items down and the rest is your skill as a pilot. If you have it, your in. If not, they will not waste to much time on you. I do not know where you come from, but sim time is very expensive in the real world. Airlines do not like to waste money on this crap.

Good luck.