For interns, the interviews are pretty easy, interviewers tend to go easy on you and they won't pick apart your presentation or your resume. Interviews can be one to two rounds (some have a screening round). You'll know you're at your final round when you give the presentation. Be as technical as humanly possible during the presentation, follow up questions were very easy and generally not too technical. Heard back the next day. The more they like you in the presentation, the easier the technical questions tend to go.