I went through three interviews which were about two hours each. I also answered a list of 5 or so questions about why I wanted the job and why I thought I was a good fit. For interviews in general, I've noticed that the number of interviews and the length really depends on which department you are applying for. My first interview was with the person who would be my supervisor. The second interview was a "cultural fit" interview with two other employees at the company, followed by an hour with the owner of the company. My last interview was lunch at a nearby restaurant, which was rather enjoyable. All the interviews were challenging but that was exactly what I was looking for in an employer. It was obvious that the company would care about my continuing education, personal and career growth, and happiness.