Object Oriented Programming in C++

This quiz on C++ Object-Oriented Programming (OOP) covers topics from basic class and object relationships to advanced concepts like inheritance, polymorphism, and encapsulation, to test your overall understanding of the topic. Each question contains a clear explanation, which will help you understand the correct answers and the underlying principles.

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Question 1

Which of the following is not a feature of OOP in C++?

  • Encapsulation

  • Inheritance

  • Polymorphism

  • Compilation

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Question 2

Which OOP concept refers to the ability to create a new class from an existing class?

  • Encapsulation

  • Abstraction

  • Inheritance

  • Polymorphism

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Question 3

Which of the following best describes a constructor in C++?

  • A function that is called when an object is destroyed

  • A function that is called when an object is accessed

  • A function that is called when an object is created

  • A function that is called when an object is inherited

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Question 4

What is the default access specifier for members of a class in C++?

  • Public

  • Protected

  • Private

  • None

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Question 5

What is Encapsulation in C++?

  • The ability to inherit properties from another class

  • The ability to overload functions

  • The ability to create abstract classes

  • The wrapping of data and methods into a single unit

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Question 6

Which OOP principle allows a derived class to override a method in the base class?

  • Encapsulation

  • Polymorphism

  • Abstraction

  • Inheritance

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Question 7

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

  • Virtual class

  • Abstract class

  • Singleton class

  • Friend class

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Question 8

If class A is a friend of class B and class B is a friend of class C, which of the following is true?

  • Class A is a friend of class C

  • Class B cannot be a friend of any other class

  • Class C is a friend of class A

  • None of the above

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Question 9

What will be the output of the below code?

C++ 
#include<iostream.h>
class Point {
   int x, y;
public:
   Point(int i = 0, int j = 0) { x = i; y = j; }
   int getX() { return x; }
   int getY() { return y; }
};
int main() {
   Point p1;
   Point p2 = p1;
   cout << "x = " << p2.getX() << " y = " << p2.getY();
   return 0;
}

  • x = garbage value; y = garbage value

  • x = 0; y = 0

  • Compiler Error

  • Runtime Error

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Question 10

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

  • Data hiding

  • Dynamic Typing

  • Dynamic binding

  • Dynamic loading

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There are 23 questions to complete.

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