As has been said, when you get here, have your company provide you with whatever study material they have (or ask if they can email it to you now).
There's no official source of study material, that I'm aware of. I have a hard copy of study material, but that won't help you now.
I wan to reiterate that this is strictly a "memorize the answers" type test. Much of it won't make any sense whatsoever.