Isabella's Computer Science Crossword

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Across
  1. 4. a named set of instructions to perform a task
  2. 6. a method that does not have its implementation or body
  3. 7. the variable does not refer to any object
  4. 11. an instance of a class
  5. 13. abstract classes can be used to create objects. True or false?
  6. 14. base number for octal system
  7. 16. base number of hexadecimal system
  8. 18. "abstract" keyword is used to denote that a method is abstract in the method header. True or false?
  9. 19. a variable defined in a class that represents an attribute of an object
  10. 20. decimal representation of 19 (hexadecimal)
Down
  1. 1. generic class (or type of object) used as a basis for creating specific objects that conform to its protocol, or the set of operations it supports.
  2. 2. an object whose state cannot be modified after it is created
  3. 3. a programmer-defined blueprint from which objects are created
  4. 5. where a variable can be used
  5. 8. an operator that returns a Boolean value
  6. 9. to exit a method and go back to the point in the program that called it with the requested value or information
  7. 10. a class that contains only constants and abstract methods
  8. 12. decimal representation of 1010 (binary)
  9. 15. a class can implement more than 1 interface. True or false?
  10. 17. decimal representation of 13 (octal)
  11. 21. base number of binary system