It was more of how you take control of the interview before the interviewer takes it . I was asked a guesstimate , a moderate level pattern program , what’s oops and what are its components , why me being a from core engg background chose to sit for this interview , my co-curricular … You just have to keep the conversation going along , and not take it like an interview. Rather you should view it as if you were talking with your fellow colleagues about some problems and helping them solve them along with occasional chit chats