It depends—when I was at one of the really visible companies, it wouldn’t have surprised me if as much as a third of the people I screened had lied on their resume. I’d ask folks to write functions to count the number of times the letter ‘a’ appears in a string, stuff like that. Did not need to compile or run.

I had a person break down and confess, and we spent the rest of the interview talking about how their codecademy lessons were going.