Deutsche Telekom interview questions

The interview was pretty good, R1 : DS easy question based on string, core java questions [basic]. R2 : Questions around java, spring boot, a bit of multi-threading related questions, easy questions, questions on hibernate(transaction isolation and propagation types.). A short design discussion on designing a pricing service, which would change the price of the flights on the basis of last booking, a discussion around how I'd approach the problem, R3: It was with their German stakeholders, mostly questions were very basic and revolved around project & day to day activities.