HP first round: how do you manage transactions in microservices? how do we maintain different configurations in the spring boot application? what are the annotations used in the Spring boot application? why do we use primary annotation? what is the use of qualifiers? what is a saga pattern? what are the design patterns used in microservices? How can we run an application on multiple ports? How do we do load balancing? what is an API gateway? what is the fallback pattern? what is the circuit pattern in java? Usecase of Optional class? what is a functional interface? can we declare main method in functional interface? what are intermediate and terminal operators? how can we enable an endpoint of the actuator in spring boot? Add four list objects in one using java 8. Find the frequency of a character in a string using java 8. Convert a string into a byte array? Print odd numbers and even numbers up to 100 using two threads. Difference bwteen kafka and Rabbit mq? HP 2nd round: 1)How can you say your application needs mongo DB in your connect project? 2)How will you increase the scaling on an API? 3)How can you check the performance of an API? 4)Write a program to add an element at position k in the linked list if k is greater than the size of the linked list add at last?