Younger/earlier in career folks are usually cheaper, which companies like.

Though I imagine they could just ask "when was your last algorithms course?" (and possibly where, and what grade you got) and save a lot of time. Or they could just ask "what year did you graduate from (whatever school level)?"

But that wouldn't be as useful for making the candidate "jump through more hoops" and reinforcing compliance as well as status hierarchy - important things at most companies.

And some people may have cheated their way through their algorithms class, so maybe they can be detected if it was recent enough.