Case study was about the business side of a bakery business. I had to read the case study, ask any questions, then the interviewers left the room for 30 minutes while I worked on my solutions to the case. I used the entire whiteboard space in the interviewing room! There's no right or wrong answer, I learned. Just some answers are better than others. The objective is to see how the person can think on their feet, given the time constraints.