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