OOPS Concepts Questions and Answers updated daily – C++



25 OOPS Concepts Questions and answers section with explanation for various online exam preparation, various interviews, C++ OOPS Concepts online test. OOPS Concepts Questions with detailed description, explanation will help you to master the topic.

OOPS Concepts Questions

1.
  Which of the following approach is adapted by C++?



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Correct Ans:Bottom-up
Explanation:


2. Which of the following concepts means determining at runtime what method to invoke?



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Correct Ans:Dynamic binding
Explanation:


3. Which of the following is not the member of class?



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Correct Ans:Friend function
Explanation:


4. Which of the following is not a type of constructor?



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Correct Ans:Friend constructor
Explanation:


5. Which of the following type of class allows only one object of it to be created?



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Correct Ans:Singleton class
Explanation:


6. Which of the following are available only in the class hierarchy chain?



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Correct Ans:Protected data members
Explanation:


7.
Which of the following is correct about the statements given below?

All operators can be overloaded in C++.
We can change the basic meaning of an operator in C++.



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Correct Ans:Both I and II are false.
Explanation:


8. Which of the following is a mechanism of static polymorphism?



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Correct Ans:All of the above
Explanation:


9. Which of the following header file includes definition of cin and cout?



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Correct Ans:iostream.h
Explanation:


10. Which one of the following is the correct way to declare a pure virtual function?



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Correct Ans:virtual void Display(void) = 0;
Explanation:


11. Which of the following statements regarding inline functions is correct?



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Correct Ans:Both A and C.
Explanation:


12. In which of the following a virtual call is resolved at the time of compilation?



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Correct Ans:Both A and B.
Explanation:


13. Which of the following operators cannot be overloaded?



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Correct Ans:?:
Explanation:


14. Which of the following is an invalid visibility label while inheriting a class?



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Correct Ans:friend
Explanation:


15.
Which one of the following is correct about the statements given below?

All function calls are resolved at compile-time in Procedure Oriented Programming.
All function calls are resolved at compile-time in OOPS.



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Correct Ans:Only I is correct.
Explanation:


16.
Which inheritance type is used in the class given below? 
class A : public X, public Y {}



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Correct Ans:Multiple inheritance
Explanation:


17. What will happen if a class is not having any name?



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Correct Ans:Both A and B.
Explanation:


18. Which of the following keyword is used to overload an operator?



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Correct Ans:operator
Explanation:


19. What is correct about the static data member of a class?



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Correct Ans:Both A and B.
Explanation:


20. Which of the following access specifier is used as a default in a class definition?



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Correct Ans:private
Explanation:



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