30.What is the output of the following program ?

#include <iostream>

using namespace std;

class Demo {

public:

    static int count;

    Demo() { count++; }

};

int Demo::count = 0;

int main() {

    Demo var1;

    Demo var2[5];

    cout << var1.count;

    return 0;

}

Explanation:

• int Demo::count = 0; initializes the static variable count to 0.

• Demo var1; → constructor is called once → count = 1.

• Demo var2[5]; → constructor is called 5 times (for each element in the array) → count = 6.

• Since count is static, it is shared among all objects.

• Finally, cout << var1.count; prints 6.

? Correct answer: (A) 6 ✅