Exam 9: Inheritance

Consider the following code snippet: Assume that the Auto class inherits from the Vehicle class, and both classes have an implementation of the moveForward method with the same set of parameters and the same return type.What determines which class's moveForward method is to be executed?

Consider the following code snippet: What does this code do?

With a few exceptions, what access should instance variables of classes always have?

Consider the following code snippet: Assume that the Employee class has not implemented its own toString() method.What value will s contain when this code is executed?

Which of the following statements about inheritance is correct?

Consider the classes shown below:

In Java, if you define two methods that have the same but different parameter types, the compiler will not complain. Why not?

Suppose the class Message is partially defined as shown below: A subclass of Message, Excitedimessage, is defined that will behave like Message, except that it will add two exclamation points to the end of the message. Sample code that uses Excitedilessage is shown below: Which ExcitedMessage constructor will give this behavior?

Consider the following code snippet that appears in a subclass: Which of the following statements is true?

Consider the following code snippet: If a Motorcycle class is created as a subclass of the Vehicle class, which of the following statements is correct?

Suppose the class Value is partially defined below A subclass of Value, LargerValue, is defined with a getValue method that returns twice the value of the parent.Which line is the body of LargerValue's getValue method?

What is a class called that represents the most general entity in an inheritance hierarchy?

Which reserved word must be used to call a method of a superclass?

Consider the classes shown below:

Consider the following code snippet: What does this code do?

Consider the following code snippet: Which of the following statements is correct?

Consider the hierarchy of classes shown below. Which represent valid class headers that would be found in this hierarchy?

Consider the following inheritance hierarchy diagram: Which of the following statements is correct?

Consider the Counter class below.

Consider the following class hierarchy: When an object of type Vehicle is constructed, what will be printed by the constructors from this inheritance hierarchy?