I was referred by a friend. HR requested basic details over email and an interview was scheduled as a telephonic call. 2 persons joined in a conference call. It took around 45 minutes. Too much noise from background and interviewer never put himself on mute even after my request. Attitude of the interviewer was very bossy. He is always right and does counter question or try to prove you wrong for each answer. He expected ditto book answer similar to "What is a machine" from 3 idiots.