Constructors and Destructors in C++ MCQ question and answer with solution | C++ Programimg MCQs

#include <iostream>  
using namespace std;
class A{
	A(){
		cout<<"A's Constructor called\n";
	}
};
class B
{
public:
	A a;
	B(){
		cout<<"B's constructor called\ns";
	}
};
int main(int argc, char const *argv[])
{
	B b;
	return 0;
}

class A{
		int a;
	        public:
		A(int i)
                {
			a = i;
		}
       }

#include <iostream>  
using namespace std;
class A{
	~A(){}
};
class B
{
public:
	A a;
};
int main(int argc, char const *argv[])
{
	B b;
	return 0;
}

#include <iostream>
#include <string>
using namespace std;
class A{
	int a;
public:
	A(){
		cout<<"A's constructor called";
	}
};
class B{
	static A a;
public:
	B(){
		cout<<"B's constructor called";
	}
	static A get(){
		return a;
	}
};
A B::a;
int main(int argc, char const *argv[])
{
	B b;
	A a1 = b.get();
	A a2 = b.get();
	A a3 = b.get();
}