Why not just:

"Implement xxx"

?

I don't think we can offend these things (yet).

idk, my thinking is that sweatshop-slack-like inputs might correspond to more professional outcomes than exam-like questions as exams would be more likely to be solved by beginners. I also fear "Implement xxx" might be just too short, I feel they might like to have some bytes to map to outputs. Could very well be placebo as pointed out.