Is a rehearsal required before the demo? I get a big "NO" from most of the people.Interestingly, my teams did a lot of rehearsal for this big day.The reasons being, we were trying a single demo for a complete product line i.e. 7 teams on a back to back format at one stretch within a stipulated time of 2.5 hrs. It is very valuable to look at the state of the product at the end of each sprint, both from the functional perspective and from the technical perspective. A demo is one way to do this.