Rolls-Royce Development Engineer interview questions

I applied in May 2017 and in 2 days I did receive a short call from HR, with some general Questions. After that, I was invited to a phone interview with the Chief Engineer. The interview took 30 minutes and was more competences based and current/previous experiences. After 2 weeks, RR invited me to an assessment day, which involved: Site Tour, Interview (Technical And Competency Based Questions) and Group Exercises. The site tour was amazing and the environment was really chill out. The technical interview was very difficult, with very specific questions about a Trent 900. I didn't get an offer; however, the all process was amazing and Rolls-Royce people always treated me very well.