45 minute phone interview: program a computational geometry problem, the phone interviewer did not ask anything else at all. onsite: preparation: I prepared for two weeks. I had been asked to brush up on my algorithms. So I basically took, the online course @aonecode.com Algorithms class and parts of Prof. Erik Demain's class on Advanced data structures. Also leetcode/geeksforgeeks.org also helped me. Even if you don't get the offer letter, I would say that taking these classes are very good for your future technical skills. 5 people interviewed me, 45 minutes each. Most of the questions were related to algorithm and data structures that I have prepared for. 2 rounds are viz: computer vision and machine learning. Since I had just switched into these areas, I was not an expert and my answers were often patchy. One of the interviewers asked me a question on large scale system design. I am just waiting for the results.