Okay, it's been awhile for me, but it was one on two with a chief piltot and a lady from HR. They asked me a bit about the aircraft I was flying, and some technical questions. It was pretty easy, as the Chief pilot asked me first, how much does your current aircraft weigh? I said 45,000 lbs, and after that it seemed pretty easy.
If you are asking about the tech eval, I hear it has changed a bunch since I did it. Now they use the same light pen test that Delta uses. I would recommend Air Inc for their gouge, as they helped me a lot when I did it. Good luck to you.
My interview was on Aug 29. My start date is on Jan. 23. As for the interview it consists of three parts. The tech/hr is no problem, just be up on your operating regs and systems of your aircraft. The hr person asks general questions about why you want to work for Comair, etc. The apt test is not hard, you can get the materials from Air Inc. The cognitive test is challenging. Treat it like a video game and it is no problem.