I was given a call by the corporate recruiter. He seemed OK - asked me some fair questions and said to proceed further, I'd like to send you a UI design (wireframing) test. He sent me an open ended problem to design. I was surprised to see this test - because typically such design tests are asked in interviews and people generally expect you to whiteboard a design. In any case, I created a UI mockup and sent it to them along with the assumptions I had made, what other UI's I'd need to design in addition to the one asked, and description of interactions on the screen. I got no response from them. I pinged them back after 4-5 days. The recruiter gets back to me saying that they had changed the design and made it more complicated than the one before. He also said that a "lot of candidates" had presented the same design. I was taken aback. I don't see any issue with complicating a design, but, honestly I would prefer doing this in a 1:1 interview. If they wanted to assess that I had wireframing and pixel-perfect design skills, they had accomplished that with the first design test. I smelt fraud in here. I thought about the test again, gave them the benefit of doubt and redid the design and sent it to them. This time, I created a little spec with more details in addition to the wireframe. Again no response. I pinged him after a few days. He said that he had sent me an email a "while back" to say that I had not been accepted. The "while back" happened to be 2 minutes before the response to my email. I was furious. I accept the fact that my design may not have met their requirements. However, I think this conduct was totally unethical. They were fishing for design solutions.