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Using encapsulation data security is _____.

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Important Questions on Object Oriented Programming

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Which among the following would destroy the encapsulation mechanism if it was allowed in programming?
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Which among the following can't be used for polymorphism?
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In case of using abstract class or function overloading, which function is supposed to be called first?
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Which feature allows open recursion, among the following?
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If a base class is inherited in protected access mode then which among the following is true?
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When OOP concept did first came into picture?
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If two classes derive one base class and redefine a function of the base class, also overloads some operators inside the class body. Among these two things of function and operator overloading, where is polymorphism used?