The first group of developers was great and did a JavaScript coding exercise. They were more curious about my thinking process and we worked through the problems together. It was actually a lot of fun. The last group didn't seem as experienced with interviewing other developers and I found many of their questions phrased vaguely, which led me to give incorrect responses and I should have asked for more clarification at times. Also asked about some pretty advanced JavaScript topics that I don't have experience with and that seemed to hurt me.