☕ Java developer interview prep — fresher to 5 YOE

Java Developer Interview Questions

286 questions across Core Java & OOP, Collections, Multithreading, Exceptions, Java 8, Modern Java (9–21), JVM internals, and the Spring Boot ecosystem (Core/DI, REST, Data JPA, Security, Testing & Microservices, plus real-world production scenarios) — every question and answer laid out on one page per topic, no clicking to reveal. Each one carries an importance level and the experience level it typically targets.