Sales and Trading Summer Analyst

I applied for the internship posting on my school's career site and heard back about first round interviews. The interview took place at my school and was a 1 on 1 interview. The interview was mainly behavioral with questions about the market. There were about 8-12 people interviewing for the position and I heard they would only take 1 or none. I heard back later that day that I was selected for the superday interview via email. Next week I had the superday interview which was 3 1-on-1 interviews which lasted about 30 minutes each. Each interviewer had his/her own interviewing style but it seemed like they each had a list of standard questions to ask the interviewee. We were told at the end of the superday that we would either hear back that night or the next business day. I was called the next business day and was told I was offered a position as a summer analyst in sales and trading.