Bait and switch tactics. Supposedly was going to interview with co founder and received calendar invite from their email. The sender may or may not have been them. Surprise, surprise, when the interview came, they were too busy and could not make it, and someone else was there. They were fishing for free consultations during the interview. Yikes.

You get an introduction interview where you meet the CEO of the company. You introduce yourself and answer the general questions. After that the questions become more technical depending on your position. However, this is not a technical interview, it is more of what you are capable of.