Found the internship via university career website. Got an email inviting me to a phone interview about 10 days after I submitted my application. I called the hiring manager who is also the supervisor of the position and had a great talk about 45 mins (he's really nice and friendly). Got back from the phone interview after 3 business days to do an on-site interview with the supervisor and his manager which lasted about 30 mins. The on-site interview was more of a conversation. Got the offer about 4 business days after the second interview. Just standard interview questions and nothing tricky.