> It would probably be easy to cheat too. When I was in college a few years ago, one professor included this thing[1] in his (shell, spit and duct tape) auto-g

> It would probably be easy to cheat too. When I was in college a few years ago, one professor included this thing[1] in his (shell, spit and duct tape) auto-grading system. It works by generating an AST of the input and comparing it against a bank, e.g. other submissions from the same class or prior years' classes. Apparently, it worked pretty well for flagging potentially problematic portions for manual review. In a well-designed implementation of an auto-grading pipeline, I doubt that plagiarism is much more of a problem than in a purely manual grading scheme. --- [1] http://theory.stanford.edu/~aiken/moss/ http://theory.stanford.edu/~aiken/moss/