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Which concept of OOP allows to create a class which can not be instantiated ?
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3
Which modification of the following code WILL NOT make the output be "success" ?4
When can you do a+b in OOP ?3
What does the following code return ?6
Can a class implements several interfaces ?9
Inheritance in OOP.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.