Most of them are irrelevant, mostly they focus on how to break things rather how you make. All questions are anti pattern to micro services. Eg: Interviewer asked he will declare react controller in Spring boot application. What that fun of inject react controller there? How will you break Singleton ? By serialization, I know the answer but I said I know how construct. How to security breach and more I felt ethical hacking questions. I had implemented bank applications where they use typical encryption and he is asking me how you break those?