1. Basic Java Concepts:

   • What is the difference between JDK, JRE, and JVM in Java?
   • Explain the concept of object-oriented programming in Java.
   • What is the purpose of the static keyword in Java?

2. Data Types and Variables:

   • Name and explain the primitive data types in Java.
   • How does autoboxing and unboxing work in Java?

3. Control Flow:

   • What is the difference between if-else and switch statements in Java?
   • Explain the use of the break and continue statements in Java.

4. Object-Oriented Programming (OOP):

   • Describe the principles of encapsulation, inheritance, and polymorphism in Java.
   • What is the significance of the super keyword in Java?

5. Exception Handling:

   • Explain the try-catch block and how it is used for exception handling in Java.
   • What is the difference between checked and unchecked exceptions in Java?

6. Collections Framework:

   • Name some classes that implement the List interface in the Java Collections Framework.
   • What is the difference between ArrayList and LinkedList?

7. Concurrency:

   • What is the difference between the wait() and sleep() methods in Java?
   • Explain the concept of thread synchronization in Java.

8. File Handling:

   • How can you read and write to a file in Java?
   • Explain the difference between FileReader and BufferedReader.

9. Networking:

   • How does the client-server communication work in Java using sockets?
   • What is the purpose of the URL class in Java?

10. Java Frameworks:

    • Explain the role of Spring Framework in Java development.
    • What is Hibernate, and how is it used in Java applications?