I had the opposite for the intro to programming class. Sure, I learned a language I didn’t know (but that took like a week tops) but all the actually programming topics were things I learned years ago. It made me very bored and gave me a tendency to skip class, which is a bad habit to fall into.

The other intro courses (eg computer architecture, which taught assembler) were great though, even if I found them easy due to prior knowledge.

Unfortunately that experiences doesn’t give a clear line for what to test out of and what not. I bet I could have passed the computer architecture one too, but I would have missed out, while the programming one would have been best if I used the time for something else (I mostly did, but there were lab sessions that were graded and couldn’t be easily skipped)