Customized Energy Solutions Senior Java Developer interview questions

Had two Rounds of interviews. 1st Round was about the process followed in the Agile processes and some technical questions. 2nd Round was completely technical, I was asked about 30-40 questions about Java, REST, database, EJBs, Threads and much more. Interviewer was the same person in both the rounds. Not Clear on what basis I got rejected, but was not expected. Interview level was good and answers were on point and apt.