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  1. What is the importance of Boolean class in Java?

  2. What is the use of StrictMath class in Java?

  3. What is the purpose of Process class in Java?

  4. When can we call wait() and wait(long) methods of a Thread in Java?

  5. What are Class/Static methods in Java?

  6. What can cause the cannot find symbol error in Java?

  7. How can we implement a moving text using a JLabel in Java?

  8. Can Enum implements an interface in Java?

  9. How can we convert a hexadecimal value to a byte in Java?

  10. How can we read from standard input in Java?

  11. How can we implement a timer thread in Java?

  12. How to make a singleton enum in Java?

  13. What is the importance of a StringWriter in Java?

  14. Can I import same package twice? Will JVM load the package twice at runtime?

  15. When to use fillInStackTrace() method in Java?

  16. Importance of clone() method in Java?

  17. Importance of StringReader class in Java?

  18. Why the transient variable is not serialized in Java?

  19. How many ways to make an object eligible for GC in Java?

  20. How can we Implement a Stack using Queue in Java?
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