What is the output of the following C++ code?

#include <iostream>
using namespace std;
class Base
{
public:
    Base() { cout << "B"; }
};
class Derived : public Base
{
public:
    Derived() { cout << "D"; }
};
int main()
{
    Derived obj;
    return 0;
}
                        

Options

  • A. DB
  • B. BD
  • C. B only
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. BD

Detailed Explanation

Correct Answer: Option B

Explanation:
The base-class constructor executes before the derived-class constructor. Therefore, Base() prints B first, followed by Derived() printing D. The output is BD.