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  1. Is parent child hierarchy important on throws while overriding in Java?

  2. How to define alternate names to a field using Jackson in Java?

  3. How to convert a List to JSON array using the Jackson library in Java?

  4. How can we convert a JSONArray to String Array in Java?

  5. How to access a derived class member variable by an interface object in Java?

  6. Why a constructor cannot be final in Java?

  7. Why should a blank final variable be explicitly initialized in all Java constructors?

  8. Why Java wouldn't allow initialization of static final variable in a constructor?

  9. Can a final keyword alone be used to define a constant in Java?

  10. How to make elements of array immutable in Java?

  11. Can we initialize static variables in a default constructor in Java?

  12. Difference between constants and final variables in Java?

  13. How transient works with final in Java serialization?

  14. Why do we get ClassNotFoundException when the class exists in Java?

  15. Can we change method signature in overriding in Java?

  16. How to make a collection read only in java?

  17. How to make a collection thread safe in java?

  18. Can the overriding method throw the super-type of the exception thrown by the overridden method in Java?

  19. While overriding can the subclass choose not to throw an exception in java?

  20. What is loose coupling how do we achieve it using Java?
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