American Airlines Sr. Software Engineer interview questions

1 round with basic dsa and system design it was more technical and time is not enough with some weird problems to solve the question was not clear and it was not straightforward

two rounds of technical interview, first round java and object oriented concepts, second one problem solving, 3 question easy to medium asking about heap-dump thread-dump, stack, queue, design patterns, but not going to deep, giving a scenario and asking about the best data structure to use in this situation