Amadeus Interview Question

How many bicycles in China? Do you know design patterns? What is polymorphism? What is a pointer? How does garbage collection work? What is Agile? How many people in Amadeus? What do you know about Amadeus, please give some important figures (turnover, share price, number of employees etc.) What are the challenges ahead of Amadeus? Case study for a flight booking transaction.. Difference between json and xml..