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A child class B of an abstract class A must define the abstract methods of A.
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Overrided method visibility must be the same or less restrictive than the inherited method.3
What does the following code return ?4
Explain the difference between overriding and overloading in OOP.5
When can you do a+b in OOP ?10
Inheritance in OOP.7
Can a class implements several interfaces ?3
Which modification of the following code WILL NOT make the output be "success" ?