2 Weeks is plenty of time to get everything learned.
If my memory serves me correctly, one of the possible questions is along the lines of "where are we based overseas." If you're capable of recalling those, with the added bonus of what they are used for, you will get the "he knows what he's talking about" nod, and they will move onto something else.
They are trying to see how motivated to join you are, the more effort they realise you have put in, the more they know how badly you want that job. Once they know you have a section covered, they will move to something else, so knowing lots can only be beneficial, because if you start faffing answers you don't know the answer too... it's bad juju! Speaking of which, if you don't know the answer to a certain question, tell them the truth and they will move on, the last thing you want is to make yourself look foolish.
The more you learn, the more comfortable you will feel, the less nervous you will be, and the extra confidence you will enjoy.