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  1. What are the differences between while loop and do-while loop in Java?

  2. How to solve an IllegalArgumentException in Java?

  3. How to handle the Runtime Exception in Java?

  4. What are the steps to read static members in a Java class?

  5. Why an interface cannot implement another interface in Java?

  6. Why an interface doesn't have a constructor whereas an abstract class have a constructor in Java?

  7. Can we define an abstract class with no abstract methods in Java?

  8. Why the main () method in Java is always static?

  9. Can we declare the main () method as final in Java?

  10. Why Object class is the super class for all classes in Java?

  11. When should we create a user-defined exception class in Java?

  12. What are the different types of classes in Java?

  13. What are the differences between default constructor and parameterized constructor in Java?

  14. Why we should follow the naming conventions in Java?

  15. How many ways to prevent method overriding in Java?

  16. Can we declare more than one class in a single Java program?

  17. What is a constant and how to define constants in Java?

  18. Can we create an object of an abstract class in Java?

  19. When to use an abstract class and when to use an interface in Java?

  20. What is the importance of the Throwable class and its methods in Java?
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