Code sample request is usually asking for a copy of code you already wrote. I have some small projects that are suitable for that. What you are talking about

Code sample request is usually asking for a copy of code you already wrote. I have some small projects that are suitable for that. What you are talking about is programming assignment. I refuse that always out of principle. First, I don't have a couple hours to waste just for an interview. Second, it's insulting to someone with a lot of experience and good education. Is your stupid assignment going to measure more than my 10 years of experience and CS degree from a good university? If you aren't willing to spend 15 minutes on a phone interview figuring out if I'm competent or not, based on my experience, then I'm not wasting my time on your stupid assignment. Third, I noticed that people who give programming tests and assignments tend to be less desirable places to work. So, refusing the test or assignment helps me avoid wasting time interviewing with clueless people. Finally, there always are the sleazebags looking for free consulting, which is what's happening in this case. Accept that there never was a decent job available with this client, don't waste your time, and move on to the next opportunity.