Overloading In C++ Mcq Exercise 4

1. Can we overload the assignment operator (=) in C++?

• ✅ Both
• ✅ None of the above

Explanation:

The correct answer is option (a). In C++, the assignment operator may be overloaded to customize the assignment behavior for a class object.

1. Can a non-member function be used to overload operators in C++?

• ✅ Both
• ✅ None of the above

Explanation:

The correct answer is option (a). Operators can be overloaded using the non-member functions, mainly when they require to access private members of a class using friend functions.

1. Which of the following operators cannot be overloaded in C++?

Explanation:

The correct answer is option (c). The .* operator cannot be overloaded in C++.

1. Which of the following statements about destructors in C++ is true?

• ✅ Destructors can be overloaded.
• ✅ Destructors cannot be overloaded.
• ✅ Destructors must return an int.
• ✅ Destructors are overloaded automatically.

Explanation:

The correct answer is option (b). Destructors cannot be overloaded, and every class can have only one destructor in C++.

1. Can constructors be overloaded in C++ programming?

• ✅ Both
• ✅ None of the above

Explanation:

The correct answer is option (a). In C++, constructors can be overloaded by defining two or multiple constructors with different types of parameter lists.

1. What will be the output of the following code?
Example
Copy
#include<iostream>

using namespace std;

class Integer {

    int value;

public:

    Integer(int v): value(v) {}

    friend ostream& operator<<(ostream &out, const Integer &i);

};

ostream& operator<<(ostream &out, const Integer &i) {

    out << i.value;

    return out;

}

int main() {

    Integer i(10);

    cout << i << endl;

    return 0;

}
Try it Yourself

• ✅ Compilation error
• ✅ Runtime error
• ✅ Undefined behavior

Explanation:

The correct answer is option (a). The << operator is correctly overloaded as a friend function. It prints the value of the Integer object.