All methods in an abstract class must be declared abstract.

A. True

B. False

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  3. The name of a Java program file must match the name of the class with the extension Java.
  4. Throwing an exception always causes program termination.
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  6. The setBackground() method is part of the class
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  9. Declaring a method synchronized guarantees that the deadlock cannot occur.
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  12. A method declared as static can not access non-static class members.
  13. Which of the following statements are true?
  14. Give file is a file object, which of the following are legal statements to create a new file.
  15. The keywords reserved but not used in the initial version of Java re:
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  18. Every method of a final in class is implicitly final.
  19. Which of the following methods belong to the String class?
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  21. All methods in an abstract class must be declared abstract.
  22. For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
  23. Which of the following are not keywords?
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  25. It is perfectly legal to assign a subclass object to a supper class reference.
  26. In RMI before running the client program we must start RMI Registry.
  27. A JSP file can be stored_________________
  28. A class may be both abstract and final.
  29. It is perfectly legal to refer to any instance variable inside of a static method.
  30. When we implement an interface method, it should be declared as public.