What they check
Strong Core Java (OOP, Collections, Streams, Multithreading)
Spring Boot (REST, JPA, Security)
SQL (joins, group by, window functions)
Problem-solving (coding)
Microservices basics
Project explanation
Typical questions
Explain your project architecture
Write a Java program (Streams / DSA)
Implement REST API scenario
SQL query: top salary, joins, nested queries
Microservices: service discovery, API gateway
Exception handling, thread safety, memory concepts