Object-Oriented Programming · Question 22 · Medium
What is the output of the following C++ program?
#include <iostream>
using namespace std;
class Shape {
public:
void name() { cout << "Shape "; }
virtual void area() { cout << "ShapeArea "; }
virtual ~Shape() {}
};
class Circle : public Shape {
public:
void name() { cout << "Circle "; }
void area() override { cout << "CircleArea "; }
};
int main() {
Shape* s = new Circle();
s->name();
s->area();
delete s;
return 0;
}- Circle CircleArea
- Shape CircleArea
- Shape ShapeArea
- Circle ShapeArea
Answer and explanation
Answer: B. Shape CircleArea
Explanation: name() is not virtual, so the call is bound at compile time by the pointer's type (Shape*) and prints Shape. area() is virtual, so it is dispatched at run time to the actual object, a Circle.
Previous: What is the output of the following C++ program? · Next: What is the output of the following Python code?
Practise object-oriented programming
Try a fresh set of object-oriented programming questions with an explanation after every answer, free and without signing up: Object-Oriented Programming practice. Or sit a full placement mock test.
More object-oriented programming questions
- Creating an object of a class, for example with new Student() in Java, is…
- Which OOP concept means exposing only the essential features of an object…
- What is the output of the following C++ program?
- What is the output of the following Python code?
- Which SOLID principle says a class should have only one reason to change?
- Which design pattern ensures that a class has only one instance and provides a…
- A House is made of Rooms, and the Rooms cannot exist without the House: when…
- What is the output of the following Java code?
- What is the output of the following C++ program?
- What is the output of the following Python code?
More technical & programming practice
DBMS · SQL · Operating Systems · Computer Networks · Software Engineering · Cloud & DevOps · GenAI Basics · Pseudo-code
LogicWiz Exams home · All practice topics · Placement mock tests · Daily 10 challenge