Quiz on Inheritance in C++

1. Which two aspects of inheritance are most important?

1. How do multiple inheritances work?

1. Features of inheritance in C++ program?

1. For creating multiple inheritance, which operator is used?

1. How deep is the multilevel inheritance in C++?

1. Which of the following is not a mode of inheritance?

1. What is the output of the following code snippet?

   #include<iostream>

   using namespace std;

   class Base {

    public:

        Base()

        { 

            cout << “Base class constructor called” << endl; 

        }

   };

   class Derived: public Base {

      public:

        Derived()

        {  cout << “Derived class constructor called” << endl;  }

   };

   int main()

   {

      Derived d;

      return 0;

   }

1. What is the output of the following code snippet?

   #include<iostream>

   using namespace std;

   class Departments {

    public:

        Departments()

        { 

            cout << “Department class constructor called” << endl; 

        }

        ~Departments()

        {

           cout<<“Department class destructor called”<<endl; 

        }

   };

   class Colleges

   {

   public:

       Colleges()

       {

           cout<<“Colleges class constructor called”<<endl;

       }

       ~Colleges()

       {

           cout<<“Colleges class destructor called”<<endl;

       }

   };

   class Students: public Departments,public Colleges {

      public:

        Students()

        {  cout << “Students class constructor called” << endl;  }

        ~Students()

        {

            cout<<“Students class destructor called”<<endl;

        }

   };

   int main()

   {

      Students s;

      return 0;

   }

1. What is the output of the following code snippet?

   #include<iostream>

   using namespace std;

   class Parent

   {

       public:

       Parent()

       {

           cout<<“Parent class”;

       }

   };

   class Child: public Parent {

       public:

       Child()

       {

           cout<<“Child class”;

       }

   };

   int main()

   {

       Parent *pa = new Child;

       Child *ch = new Parent;

   }

1.  Within the following code snippet, the private and protected members of the Superclass become which types of members of Subclass.

Class Child:protected Parent

1. What is the output of the following code snippet?

   #include <iostream>

   using namespace std;

   class Parent

   {

     public:

     int variable;

   };

   class Child : public Parent

   {

     public:

     void show()

     {

       variable=10;

       cout << variable;

     }

   };

   int main()

   {

     Child c;

     c.show();

     return 0;

   }

1. What is the output of the following code snippet?

   #include <iostream>

   #include <string>

   using namespace std;

   class Parent

   {

       private:

       float d;

       public:

       int a;

       void edit(int i){

           a = i;

       }

       void get_val_a(){

           cout<<a;

       }

   };

   class Child: public Parent

   {

       int a = 25;

       public:

       void print(){

           cout<<a;

       }

   };

   int main()

   {

       Child c;

       c.edit(10);

       c.print();

       c.get_val_a();

       return 0;

   }

1. What is the output of the following code snippet?

   #include <iostream>

   using namespace std;

   class University

   {

   public:

       University()

       {

       cout << “This is a University” << endl;

       }

   };

   class Colleges

   {

       public:

       Colleges()

       {

           cout<<“Constructor of colleges\n”;

       }

   };

   class Departments: public University

   {

   };

   class Students: public University, public Colleges

   {

       public:

       Students()

       {

           cout<<“constructor of Students class is called”;

       }

   };

   int main()

   {

       Students b1;

       return 0;

   }

1. What is the output of the following code snippet?

   #include <iostream>

   using namespace std;

   class University {

   public:

       int u;

   };

   class Departments : public University {

   public:

       int d;

   };

   class Colleges : public University {

   public:

       int c;

   };

   class Students : public Departments, public Colleges {

   public:

       int s;

   };

   int main()

   {

       Students stu;

       stu.Departments::u = 10; 

       stu.Colleges::u = 100; 

       cout << stu.Departments::u;

       cout << stu.Colleges::u;

       return 0;

   }

1. What is the output of the following code snippet?

   #include <iostream>

   using namespace std;

   class University {

   public:

       int u;

   };

   class Departments : public University {

   public:

       int d;

   };

   class Colleges : public University {

   public:

       int c;

   };

   class Students : public Departments, public Colleges {

   public:

       int s;

   };

   int main()

   {

       Students stu;

       stu.u = 10; 

       stu.u = 100; 

       cout<< stu.Departments::u; 

       cout<<  stu.Colleges::u;

       return 0;

   }