I have attended so many interviews but out of them this is varied.Interview takes a long process like almost 2 months of time.First a questionnaire is sent and once that is selected an interview for 10 mins phone call with a group of people and once that is through you will have another telephonic call which lasts for 30 mins.Then In-person interview with CEO,HR director and some important team related to project.May be the same people who are in telephonic call presents in the interview.Over all good experience for a full time opportunity.