I didn't bother to take the test described here, but I have taken the written test for a driving permit four times in my life, most recently a year ago.
I got a score of 100 every time. I did notice that there are a lot of questions now about DWI, so the test is about half road signs, half DWI questions. In the past, I remember there being more questions on things such as right of way, emergency situations and exotic turns.
I've written more extensively about my efforts to get a license here.