*Java Interview Questions With Answers* 1. *What is the difference between Heap and Stack memory in Java?* Heap is used for dynamic memory allocation (objects), while Stack is for static memory allocation (method calls, local variables). 2. *What is a race condition?* A race condition happens when two threads try to access shared resources at the same time, potentially causing unpredictable results. 3. *What is the purpose of the `intern()` method in Java?* The `intern()` method ensures that strings with the same content share a single memory reference in the string pool, saving memory. 4. *Does Java support global variables?* No, Java doesn’t support global variables to avoid namespace issues. 5. *What is garbage collection?* Garbage collection automatically frees memory by removing objects that are no longer in use, helping prevent memory leaks. 6. *What is the Java Cryptography Architecture (JCA)?* JCA provides APIs for implementing security features like encryption and decryption in Java apps. 7. *What are some popular frameworks for Java development?* Popular frameworks include Spring, React Native, ReactJS, and Angular. 8. *Explain lock-free programming in Java.* Lock-free programming uses atomic operations to ensure thread-safety without locks, improving scalability but making code more complex. *React ❤️ for more*