Object Oriented Programming in C++ MCQ question and answer with solution | C++ Programimg MCQs

#include<iostream> 
using namespace std; 
class Base { 
public: 
	Base()	 
	{ cout<<"Constructing Base \n"; } 
	~Base() 
	{ cout<<"Destructing Base \n"; }	 
}; 
class Derived: public Base { 
public: 
	Derived()	 
	{ cout<<"Constructing Derived \n"; } 
	~Derived() 
	{ cout<<"Destructing Derived \n"; } 
}; 
 
int main(void) 
{ 
	Derived *d = new Derived(); 
	Base *b = d; 
	delete b; 
	return 0; 
}

#include <iostream>
using namespace std;
class A{
public:
	A(){
		cout<<"Constructor called\n";
	   }
	~A(){
		cout<<"Destructor called\n";
	    } 
};
int main(int argc, char const *argv[])
{
	A *a = new A[5];
	delete[] a;
	return 0;
}

int *ptr = new int;
delete ptr;
delete ptr;