Round 1: Core Java & OOP Questions on Java fundamentals: Difference between String, StringBuilder, StringBuffer Exception handling (try, catch, finally) abstract class vs interface Collections (HashMap, ConcurrentHashMap, ArrayList) Multithreading, synchronization, and possibly Virtual Threads Basic algorithms: reverse string, Fibonacci, finding max in an array Round 2: Spring Boot / Backend Concepts Spring Boot: Annotations, REST API, dependency injection, entity-relationship mapping Databases: MySQL/Postgres CRUD queries Project Discussion: You may be asked about your past projects (like Edudesk System or any full-stack work) Sometimes small coding tasks or debugging exercises