<p>If so, what can I expect? Will it be a technical interview or a behavioral one?</p>
<p>I am speaking specifically for a Masters in HCI or Robotics at the following universities: Carnegie Mellon, MIT, Stanford, UC Berkeley, UCLA, University of Washington, Georgia Tech.</p>
<p>Sometimes. Sometimes not. I cannot comment on those schools specifically, but I was admitted to some schools without an interview, while others asked for one (either phone, or they paid for the trip). In no case was it an explicitly technical interview, just a chance for the prospective advisor to talk to the prospective student and see if interests lined up. Generally speaking, if you follow what they are saying then you’ve passed the technical part of the interview.</p>
<p>For one datapoint, I was admitted to the PhD program at CMU Robotics without a formal interview. I was already working for my prospective advisor, however.</p>