Adobe Senior Software Engineer - Android interview questions

There were 2 rounds scheduled. No details were given around the rounds. There was a 2 hours slot booked on the calendar. In first round, the interviewer asked a simple Pallindrome question. Then asked 2 questions which I couldn't understand whether they were puzzles / design questions. I answered the first DS/Algo question within 15 minutes. The interviewer didn't try to explain the other questions. He concluded the interview in half an hour and then I got a mail from recruiter that they're not proceeding with my candidature. I asked for a detailed feedback of the panel and didn't get any. The interviewer also looked not interested in the interview. :(