Java remains one of the most widely used programming languages in software development, Android apps, and backend systems. Whether you're a fresher or an experienced professional, interviewers expect you to know core Java concepts.
We've collected a wide range of Java interview questions asked in top companies in 2025. This includes basics like OOP principles, collections, and exceptions, as well as advanced topics like multithreading, JVM internals, and design patterns.
What You'll Find in Our Java Interview Questions:
- Core Java fundamentals and OOP concepts
- Collections Framework and data structures
- Exception handling and error management
- Multithreading and concurrency
- JVM architecture and memory management
- Design patterns and best practices
- Spring Framework and Spring Boot
- Database connectivity with JDBC
👉 See the complete list of Java Interview Questions here
Prepare effectively with our detailed explanations and code examples for each question.