I think they are conducting interview just sake of time pass. It was just 30 min of interview and few questions based on that they have decided you are not potential fit, even I answered all those questions. Be aware before taking interview, some foolish people working there and they are thing that they are excellent coder.

Please read it carefully. First I got a call from HR. She asked me about my salary expectation to which I replied 28 LPA as I already had an offer of 24 LPA. She agreed to it and scheduled first round of interview. Round 1: It was arround 90 minutes of interview and I cleared this round. Round 2: Cancelled. Round 2: Cancelled. Round 2: The interviewer asked about my salary expectation, to which I replied 28 LPA he said here they will not pay you that much. then I said you can at least match the current offer. The interviewer said we can offer you at most 18-19. I said I already have an offer and I would not accept an offer below that. I just wasted multiple opportuny to attend this interview.