Amadeus interview questions

Following online application, HR contacted me to arrange an initial one on one interview. The was held at the London Gatwick office, which was easy to find and park. The interview started precisely on time. I wasn't told before the interview that this was only the first of two rounds of selection - candidates shortlisted from the initial interviews will then have a case study test follow up about a week later.

5 rounds of interview, was more into discussion along with technical questions. they where asking related to the same mentioned in resume. about previous company, what we did, how we handled, whats the most difficult issue that we faced