Java Exercises on Keywords

For each question 1 - 12 below, check the most appropriate Java keyword response.

1. Used in a class definition in order to define a subclass of a class.

  abstract
  extends
  protected
  super

2. Used to invoke an object's superclass constructor.

  abstract
  extends
  protected
  super

3. A class that cannot be directly instantiated and is intended to be subclassed.

  abstract
  extends
  protected
  super

4. A kind of method that lacks a body.

  abstract
  extends
  protected
  super

5. An intermediate level of access between public and private.

  abstract
  extends
  protected
  super

6. A keyword that refers to whatever object uses it.

  interface
  new
  null
  this

7. A class that contains only instance methods and constants, but no instance variables.

  interface
  new
  null
  this

8. Keyword used to instantiate a reference variable--that is, to create an object that the variable will refer to.

  interface
  new
  null
  this

9. Java assigns this keyword to a reference variable that does not yet refer to any object.

  interface
  new
  null
  this

10. This kind of block includes a statement that might throw an exception.

  catch
  final
  finally
  try

11. This kind of block will handle any exception that matches its parameter class.

  catch
  final
  finally
  try

12. Qualifier used to declare a named constant (also called a constant variable) that must be given an initial value which cannot be changed by the program.

  catch
  final
  finally
  try

Last Modified: April 20, 2000