These were the technical questions asked: Features of Java 17, what is Record in Java, normal vs distributed transaction, what is Saga pattern, what is Circuit Breaker and how its implemented, difference between stack and heap, is thread data created on stack or heap, what is consistent hashing, types of caching strategies, did I work on API Gateway, types of messaging systems I worked on, why Kafka over Rabbitmq, how many kafka partitions created in my project, case study scenario of deploying services and kafka partitions, how will you improve performance of application, how was hashmap performance improved in collision after java 8, how will you ensure data consistency in distributed cache, http vs websocket difference, websocket vs live-streaming difference. A leetcode 128 (medium level) longest consecutive sequence question was asked. He told me to do a system design of WhatsApp.