Bank of America Java Developer 5+ Year Experienced interview questions

Had 2 rounds. 1st Technical Face 2 Face. 2nd Technical F2f and then HR round. 1st round was quiet easy. Not any theoritical questions. The person was more keen to know the practical knowledge and asked scenarios to to solution for that. People who have clear understanding on the concepts easy to crack. 2nd round was quiet difficult. The person was not satisfied with my answers and he was expecting more and more. He was asking in-depth questions about the topic. Was hard to crack.