Just ask yourself. Did you learn the course well enough that you could have done as well without those questions saved?
As others have said, we go to college these days for a fastpass to middle class. If you haven’t needed the knowledge since, maybe you got what you needed out of the class and you worked the system in a legal way. Or maybe you paid a lot of money for that class and yet cheated yourself out of the knowledge you were paying to be taught. On some level it comes down to how you feel about it.
Since that class I've reached the conclusion that school is not the best way to learn concepts and materials but to learn how to work a bureaucratic organization to reach your own end goal (whether it's a job, ticket to the middle class, or simply knowledge), which in itself is a valuable skill. I think museums, seminars, and some NPR shows ended up being the best ways for me to really master the material I would've otherwise learned in school.
I think anyone who is naive enough to think that school is about anything but conformance deserves to fail. I did some courses before college and got a high grade and when I went there for my bachelor's degree, they didn't count that course towards my credit points, I had to do it again. In other words, my knowledge means jackshit at a educational institution. The only thing that matters is whether I can navigate the bureaucracy. Get that in your head.
As others have said, we go to college these days for a fastpass to middle class. If you haven’t needed the knowledge since, maybe you got what you needed out of the class and you worked the system in a legal way. Or maybe you paid a lot of money for that class and yet cheated yourself out of the knowledge you were paying to be taught. On some level it comes down to how you feel about it.