There was a telephonic round followed by on-site call. The onsite interview consisted of 5 rounds and 1 presentation session. Interviewers were very friendly (except one) and in some cases it was more of discussion rather than question-answer based, which I really appreciated (as this is what you experience in real work environment). The only thing I didn't like was that they didn't tell me earlier that position was for both Master and PhD candidate (They told me it was only for Master candidates). But overall great experience, friendly and highly skillful team.