Written test once. I read the whole DMV booklet (I believe it was around 90 pages or so) the night before. I don't know about anyone else, but it seemed like when I took the test there seemed to be a lot more older people (late 20s, 30s, maybe even 40s) taking it.
This one lady was actually trying to copy me

I didn't mind though since I was just breezing through it. And I noticed another lady cheating with some type of hand held device she was reading stuff off of
The driving test was once as well. What my uncle and I actually did was follow the instructor around while he was administering the test and just mimicked whatever he had the student do. I believe I did it twice around so by the time it was my turn I just had the routine basically memorized.