World 50 Group Membership Development Associate interview questions

i was referred by a current employee. that person sent my resume to the team manager/HR. i set up an interview for the following week. 3-4 hour interview process meeting with about 8 different people. all sorts of interview questions.

1. Typical phone screening with recruiter 2. Informal phone interview 3. Formal interview in multiple rounds consisting of a total of 7 interviewers on a Wednesday 4. Was contacted at 4:15 PM on Friday to complete a detailed assignment, relative to the position, for them due at 3:00 PM the next day. Received email response on the following Monday confirming they had received the completed assignment. 5. Interviewed by 2 members of upper management Received a call about a week and a half later with the following: "Hey, did anybody call you about the job?" -No "Oh, well somebody was supposed to call you. We decided on somebody else"