The interviewer was friendly but quite formal and unemotional. But the real problem was in terrible audio quality. It was difficult to make out the words. Then they asked me the questions regarding Java memory, OOP cohesion/coupling, equals/hash code, Hash map collision, Spring annotations (@Repository, @Service, @Controller), Hibernate caching, REST methods, using ThreadLocal, Spring Test annotations (why do we need @ExtendWith) etc. In general all questions were worthy. At the end they proposed to solve the algorithmic task. It is well known as Two-Sum at LeetCode

I applied through Linkedin and got a mail for the first round of interview which happened with a person and he gave me one program and asked me to find the problems in the code or how we can improve the code. I answered him but he was asking questions inside questions from me.