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Comp 249 - Inheritance Questions And Answers Latest Update (2025)!!
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  • March 7, 2025
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2025




Comp 249 - Inheritance Questions
And Answers Latest Update
(2025)!!




What is a Covariant Return type? - Answer The superclass has
a method that returns the type superclass.

When a subclass inherits this method, you can change the return
type to a subclass of the original return type.

You couldn't change return type superclass to return type int,

you could change return type superclass to return type subclass.



Can you change the access modifiers of a METHOD with
inheritance? - Answer Yes, a subclass can make the access
modifier more inclusive (private -> public) but you CANNOT make
a method more restricted.




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2025
What is method overriding? (not to be confused with overloading)
- Answer Method Overriding is when you change the methods
definition in a subclass, but not its signature (same parameters).



What is a Method signature? - Answer A method signature is
its combination of the method name and parameter list



What is method overloading? - Answer Method Overloading is
when you override the method and change the parameters.
(Change the method signature).



When you overload a method, is the original method also
inherited? - Answer Yes! You'll have the overloaded method
and the original method which will be called depending on which
parameters are included.



What does the final modifier do on a method? - Answer
Putting final on a method means that it cannot be overwritten.
Despite this, you can overload a final method.



What does the final modifier do on a class? - Answer The final
modifier on a class means that you cannot create subclasses from
this class. (it cannot be extended)



What does the super() method do? - Answer super() calls the
constructor of the parent class, often times used to instantiate
variables of the subclass ex: super(int 1, int 2)


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