I've done a lot of screening interviews and cheating does happen. Some of my favorites:
* developer attempts to pass something off as video lag, as he attempts to lip sync someone else's answer.
* developer had printed all the 'common' answers on the wall behind his computer, and would look up to them for reference as we were talking. Then the tape came off and covered him in a a paper stack overflow.
* the glorious mechanical keyboard, as they google for an answer.
* interviewed one person and had a different one show up.
* developer attempts to pass something off as video lag, as he attempts to lip sync someone else's answer.
* developer had printed all the 'common' answers on the wall behind his computer, and would look up to them for reference as we were talking. Then the tape came off and covered him in a a paper stack overflow.
* the glorious mechanical keyboard, as they google for an answer.
* interviewed one person and had a different one show up.