[jeffbarr]

I was about to say the same thing. The only reason that a bar raiser would ask the question would be if the applicant claimed to have the knowledge. If your resume claims a certain number of years of experience with a language, and you are asked how well you know it, you'd better be very confident before you say that you are an expert.

[twistedpair]

One of my favorite red flags. If you put it on the resume and I ask about it, and you've never used it, gong time. Personally I redact my resume every year from stuff I've done long ago. If you're not proficient, don't advertise it.