It was one of their non-traditional group interview processes that they have started doing. Arrived at 8 in the morning and was given a tour. They did say that more people who go on the tours get offers than those who don't, however they did also say that they don't take it in to account. Anyways, we were shown around a couple buildings and then returned to where we would be for the rest of the day. We were put in to groups of 3 and given a problem to solve. The problem could be divided amongst each person so everyone had something to work on. Then at times throughout the day we spoke with Amazon engineers about our solution and then some more traditional coding interview questions. All in all it was quite difficult but I did actually end up enjoying this experience more. It gave you an idea of what it was like to work at Amazon and also it was easier to relax with other team members with you. Amazon is highering a ton so they did say that it wouldn't be a competition and that everyone would be evaluated separated from one another.