Investment Banking summer analyst

I was first notified that I had two phone interviews for the first round. They were both typical banking interviews with a mix of behavioral and technical questions. The two interviewers were alumni from my college. The technical portion included details on DCF valuations such as explaining some of the formulas used. I was also asked if I was following any trends in the market and what news I read about JP Morgan. Each interview lasted for almost an hour. After a few days I heard back that I was invited to the superday in a few weeks. The superday had a networking breakfast in the beginning. I had three interviews with two managing directors and an executive director. Each interview was very different and asked high level technical questions which tested my understanding of investment banking and how it relates to the overall economy. The superday was on friday and I received news that I got the offer on the following monday.