phone interview about background and experience. Specifically asked about past finished projects shown on resume. Then asked about the experimental skills they preferred candidate to have, which I don't unfortunately. The interview was comfortable, but I am not a perfect matching for their position.

No specific interview. I was a PhD student under the same person, so there was no need for any interview whatsoever. Usually I think it will go through a selection process and the Professor will decide on who he or she wants to talk to