IBM Software Engineer interview questions

Met with 6 folks (some managers and tech leads) in a single day that began at 9am and ended at 4:30pm. Managers tended to describe the products and gauge how my personality might fit within the team. Technical leads grilled me on some of the finer points of Java development, heap/stack questions, and JEE. I was also asked brainteaser / riddle style questions. While in the presence of the interviewer, I was asked to draw on the whiteboard and talk my way through solving the riddle.