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Can we create abstract methods in a non-abstract class ?
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4
When can you do a+b in OOP ?2
Which modification of the following code WILL NOT make the output be "success" ?3
What does the following code return ?11
Overrided method visibility must be the same or less restrictive than the inherited method.3
Explain the difference between overriding and overloading in OOP.9
Inheritance in OOP.6
Can a class implements several interfaces ?