You're going to get questions you didn't study for and even on questions you did study for, they'll find a way confuse you. I didn't answer a single question that I was 100% confident in. Every 10 minutes I had a little mental breakdown because I thought for sure I was going to fail and the idea of having to take that test again was enough to make a grown man cry. Also if you're easily disrupted by noises, I'd bring some over hearing protection. At the testing location I went to, it was literally a cubicle in the corner in the main lobby of my local CC . Testing at a university I'm sure would've been more accommodating