Agreed. If this is really about checking your knowledge, it would probably not be hard to convince the prof or TA to let you get feedback on a practice final, f

Agreed. If this is really about checking your knowledge, it would probably not be hard to convince the prof or TA to let you get feedback on a practice final, for no grade, without screwing over the rest of the class. Or you could just use what you learned to code a project and put it online for real peer review.