U9 Video 9.3

When does a method override occur?

• Anytime we use the @Override on the line before the method in the subclass.

• Anytime we use the @Override on the line before the method in the superclass.

• Anytime we use the @Override on the line before the method in the subclass and the method signatures match.

• Anytime a subclass method signature matches that of the superclass

Why do we use the @Override in our code?

• When we use it, the compiler checks that we are actually overriding the method we intended to.

• It is required to override a method.

• It tells Java to skip that method in the code.

• It tells Java to exit out of the code at this point.

Why might we want to override a superclass method? Select the best option.

• We override methods so that we can see how a method is working within the class.

• We override methods because superclasses cannot correctly define most subclass behaviors.

• We override a method because a subclass needs to define a behavior in a different way than the superclass.

• We override methods to make Java run more efficiently.

How does Java determine the order to execute methods between superclasses and subclasses?

• Java first looks in a subclass for a method signature. If it is found there, it executes that method. Otherwise it checks the superclass methods

• Java first looks in a superclass for a method signature. If it is found there, it executes that method. Otherwise it checks the subclass methods.

• Java first looks in a superclass for a method signature. If it is found there, it executes that method after checking the subclass for an override.

• Java starts in the Object class and works its way down the hierarchy until it finds the correct method signature.

From a design perspective, what goes in the subclass?

• Modified/Overridden methods

• 
  

  Additional instance variables specific to the subclass

• Additional methods specific to the subclass

• All of these options