C++ Programming · all questions

Object Oriented Programming in C++
practice.

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Q61

What happens if the following C++ statement is compiled and executed?

int *ptr = NULL;
delete ptr;

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Q62

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
 
class A 
{
   int a;
   A() { a = 5;}
};
 
int main()
{
    A *obj = new A;
    cout << obj->a;
}

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Q63

Which of the following is not a type of Constructor?

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Q64

Which of the following cannot be a friend?

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Q65

How access specifiers in Class helps in Abstraction?

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Q66

Which of the following approach is used by C++?

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Q67

Which of the following provides a programmer with the facility of using object of a class inside other classes?

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Q68

Which concept means the addition of new components to a program as it runs?

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Q69

What does polymorphism in OOPs mean?

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Q70

What will be the output of the following C++ code?

#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;
}

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Q71

Wrapping data and its related functionality into a single entity is known as . . . . . . . .

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Q72

What will be the output of the following C++ code?

#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; 
}

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Q73

C++ is . . . . . . . .

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Q74

What will be the output of the following C++ code?

#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;
}

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Q75

How compile-time polymorphisms are implemented in C++?

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Q76

What does modularity mean?

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Q77

How many types of polymorphism are there in C++?

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Q78

Which of the following shows multiple inheritances?

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Q79

What happens if a pointer is deleted twice in a program as shown in the following C++ statements?

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

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Q80

Which of the following is correct about new and malloc?

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