We got through the Campus Beats Case Challenge and were directly offered PPIs. There were 2 Interview Rounds. 1) A case study, similar to what we had solved in campus beats was presented to us. It was 12 pages long and operations-based. We just had 1 hour to solve and upload hand-written solutions. Case Debriefing: This round had an experienced employee evaluating our solution. It was 1 hour long and consisted of cross-questions and dwelling upon different approaches. After Clearing this round, the last round was EBI + Fit round. My interview was taken by a manager with 9 years of experience in ZS. I was asked 2 puzzles, 1 guesstimate, and several other situation-based questions.