Java
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  1. When can a .class file get created in Java?

  2. Which collection classes are thread-safe in Java?

  3. How can we get the name of the Enum constant in Java?

  4. How to make a class singleton in Java?

  5. Importance of a Locale class in Java?

  6. How can we implement a Custom HashSet in Java?

  7. How to set the color to alternate rows of JTable in Java?

  8. How can we stop a thread in Java?

  9. Importance of Thread Priority in Java?

  10. How to serialize and deserialize an object in Java?

  11. How can we add padding to a JTextField in Java?

  12. How many ways to iterate a LinkedList in Java?

  13. What is the default value of a local variable in Java?

  14. How can we rotate a JLabel text in Java?

  15. What is the purpose of using a dumpStack() method in Java?

  16. How can we set the border to JComboBox items in Java?

  17. How to check if the string begins with specific substring in Java?

  18. What are the types of variables a class can have in Java?

  19. How can we add multiple sub-panels to the main panel in Java?

  20. Can we override a protected method in Java?
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