I've had something similar happen to me at a Microsoft interview. The interviewer asked me a question I explicitly knew the answer to, and it too wasn't "my" an

I've had something similar happen to me at a Microsoft interview. The interviewer asked me a question I explicitly knew the answer to, and it too wasn't "my" answer to the problem but the one I've heard in another interview. So I just told him: "I know this one. Can you ask me something else?" He told me he appreciated my honesty, and didn't have any other questions. I got the job.