Amadeus Senior Software Entwickler interview questions

Overall average interview level, asked object oriented programming questions, total 4 rounds including HR, mostly concerned about candidate's problem solving skills. Prepare C++ concepts and data structures you will be good to go.

I was rejected in 3rd round technical. First round was of 1 hr. I was asked about my previous project, design pattern, some basic questions, and about the process. 2nd round was of 2 hrs ; I was asked about some design issues. 3rd was round again technical. I was asked about exception handling, basics, design patterns, and some advanced C++. Rejected in 3rd round. Dont know why. Questions were easy and answered all the questions except 2-3 in all the rounds