I graduated undergrad 25 years ago. I can't randomly recall tons, but there is some random stuff I do remember -- like getting an F on my first test in Numerical Analysis, but then ending with the highest score in the class for the quarter (yes, a lot of people failed every test).

But I still have my old course catalog and flipping through that, a lot of memories jump to mind in classes I totally forgot I had. So I think with some prompts you can probably remember a lot more than you think.