Went through two phone interview - one with a group member and another with the lab head. Discussion about background, what I want to do during the internship and so on. overall interesting interview.

1st interview - Skype, 15 min. Asked about stuff on resume. 2nd interview - On-site, technical, approx. 2 hours. Basic questions about data structures. Interview took approximately 2 hours, and consisted of 20 basic "define/explain what _____ is", where ____ was a common coding term like an associative array. This was followed by a timed 30 min. section where i had to code solutions to 5 questions. Finally, an hour long sessions where i wrote code on a whiteboard in response to another, more involved coding question.