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Can we create abstract methods in a non-abstract class ?
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4
Explain the difference between overriding and overloading in OOP.5
When can you do a+b in OOP ?10
Inheritance in OOP.3
Which modification of the following code WILL NOT make the output be "success" ?4
What does the following code return ?7
Can a class implements several interfaces ?12
Overrided method visibility must be the same or less restrictive than the inherited method.