I just did it about a month ago. My placement exam had just 20 questions, had an unlimited amount of time to do it, and you couldn't go back to previous questions. I took my last math class 20 years ago so there was some math on there that I once knew but had no idea how to do.
From what I remember, it had lots of algebra, some logs, and some trig which I didn't remember at all. You have to be able to factor and know your rules on exponents. I think there were some functions. One thing that saved me was that you don't actually have to know how to do a problem to get it right on a multiple choice exam. You can plug answers back into the original problem and find the correct choice. Despite remembering nothing about trig, I passed with room to spare.
I can't answer about a pre-calc final because I don't even know what is considered pre-calc. Is that the same thing as advanced algebra and trig?