During my first round interview I went through a 30 minute interview with 2 VPs. The superday consisted of 5 30 minute interviews. Be prepared for technical questions and to speak about your knowledge of the financial markets and industry, if you don't have much experience in finance, make sure that you study the 3 financial statements well and that you know how to answer basic technical questions. Overall, I'd say that the interview is as much behavioral as it is technical. Also, make sure you understand the job description, CCB can be a bit confusing since different JPM group seem to describe the division differently