I have had two engineers in the last few weeks tell me that my (correct) interview answers were wrong. It's extremely frustrating feeling to be already stressed from an interview and then deal with this on top.

In one case I argued for a while until we moved on. In the other, I was able to show the interviewer why I was right and they eventually saw my side. I'm not sure if this was poor communication on my part (definitely possible!) but I felt helpless. Still, I don't think I'd be able to intentionally say an incorrect answer just to get the job.