What is the change in memory in Java 8, Performance of HAshmaps prior to JAva8 and now , What is Autoconfiguration in spring, Spring bean lifecycle, How to exclude auto configuration,bean scopes in spring, till here i did well Then he started asking me max which I dont know design pattern in microservices how they communicate with each other wht is difference between Collection and Document in Mongo DB What is 1 and -1 in indexes of MongoDB I just worked for 2 months in Mongo DB and I didnt expeceted he would start asking me such advanced questions,any how I understood that I got rejected for the interview
