Very casual and comfortable interview, behavioral and not technical. They wanted to gauge your interest and why you would be a good fit for both the role and the comapny

I had three 30 minute skype interviews with various personnel. The first two were mostly behavioral with some questions about my math course background. I felt these were very fair, and the interviewers were interested and helpful. The third interviewer asked very few behavioral questions and asked extremely specific questions about computer programming experience. She seemed unimpressed with my resume and even the school that I attend. She asked specific questions about projects I have done with python and java. I felt that the nature of these questions were not on par with the rest of the interviews and too advanced for an internship.