what is this cFAI test?

WHat is this CFAI test that everyones talking about?? is it the free practice exam that CFAI gives u when u signed up for the dec1 test? Or is it something else that i gotta purchase separately? I tried searching but i dont understand the lingos and such…

you have to buy them they are 5 as far as i know cost 50 each and are identical to the one you will receive except that one exam has 60 questions. so pay 50 for 60 questions