The first round was an on-campus behavioral interview which consisted of four questions. After the first round was the final on-site interview which included a behavioral, case, and job-fit (technical) interview one hour each.
The interviews were not too stressful and they asked very simple questions for the technical interview. I'm not entirely sure what they're looking for in a candidate since there's no way that their technical interview can screen out a lot of people. I had no idea if I made a mistake on the technical, case, or behavioral interviews, but it was probably behavioral since that's pretty subjective (if you fit the culture or if they want to work with you).
From the on-site interview to the tour it was pretty obvious that Capital One takes care of their employees; they give you snacks and a one hour break randomly scheduled in your onsite interviews.