Quiz on Virtual, Inline and Friend Functions in C++

What is the output of the following code snippet?
#include<iostream>
using namespace std;
class Parent {
public:
          Parent() { cout<<“Constructor: Parent class”<<endl; }
          virtual ~Parent() { cout<<“Destructor : Parent class”<<endl; }
};
class Child: public Parent {
public:
             Child() { cout<<“Constructor: Child class”<<endl; }
            ~Child() { cout<<“Destructor : Child class”<<endl; }
};
int main() {
                 Parent *pb=new Child();
                 delete pb;
                 return 0;
}

What is the output of the following code snippet? 
#include<iostream>
using namespace std;
class Parent {
public:
           Parent() { cout<<“Constructor: Parent class”<<endl; }
           virtual ~Parent() { cout<<“Destructor : Parent class”<<endl; }
};
class Child: public Parent {
public:
            Child() { cout<<“Constructor: Child class”<<endl; }
           ~Child() { cout<<“Destructor : Child class”<<endl; }
};
class SubChild:public Child
{
   public:
     SubChild()
  {
      cout<<“Constructor: Sub-Child class”<<endl;
  }
~SubChild()
 {
     cout<<“Destructor : Sub-Child class”<<endl;
  }
};
int main() {
                Parent *pb=new SubChild();
                delete pb;
                return 0;
}

What is the output of the following code snippet?
#include<iostream>
using namespace std;
class Parent {
public:
            Parent() { cout<<“Constructor: Parent class”<<endl; }
            virtual ~Parent() { cout<<“Destructor : Parent class”<<endl; }
};
class Child{
public:
             Child() { cout<<“Constructor: Child class”<<endl; }
             ~Child() { cout<<“Destructor : Child class”<<endl; }
};
class SubChild:public Child, public Parent
{
public:
        SubChild()
       {
           cout<<“Constructor: Sub-Child class”<<endl;
       }
~SubChild ()
  {
      cout<<“Destructor : Sub-Child class”<<endl;
  }
};
int main() {
      SubChild *pb=new SubChild();
      delete pb;
      return 0;
}

What is the output of the following program?
#include<iostream>
using namespace std;
class University
{
public:
              virtual void courses() {cout<<“University courses”; }
};
class Student: public University
{
public:
         void courses()
         {
              cout<<“Please Enter No. of Courses available”;
          }
};
int main()
{
       Student s;
       s.courses();
}

Which keyword is used to declare the inline function?

What is the output of the following code snippet?
#include<iostream>
using namespace std;
class Parent {
public:
              Parent()
              { cout<<“Parent Constructor \n”; }
               virtual ~Parent()
               { cout<<“Parent Destructor\n”; }
};
class Child: public Parent {
public:
            Child()
            { cout<<“Child Constructor \n”; }
            ~Child()
            { cout<<“Child Destructor\n”; }
};
int main(void)
{
Child *c = new Child();
Parent *p = c;
delete p;
return 0;
}

Which of the following functions may or may not be the members of other classes?

What is the output of the following code snippet? 
#include <iostream>
using namespace std;
class Student
{
    private:
    int x, y;
    public:
    void result()
{
     x = 200;
     y = 300;
}
  friend int marks(Student s1);
};
int marks(Student s1)
{
return int(s1.x + s1.y) – 30;
}
int main()
{
   Student s;
   s.result();
    cout << marks(s);
    return 0;
}

What is the output of the following code snippet?
#include <iostream>
using namespace std;
class University
{
   int dept1, dept2;
   public:
   int record()
    {
    dept1 = 400;
    dept2 = 500;
    return dept1*dept2;
    }
friend float average(University u);
};
float average(University u)
{
   return float(u.dept1 + u.dept2) / 2;
}
int main()
{
   University obj;
    obj.record();
    cout << average(obj);
    return 0;

}

What is the output of the following code snippet?
#include<iostream>
using namespace std;
class Parent
{
public:
               virtual void display() { cout<<” In Parent Class \n”; }
};
class Child: public Parent
{
public:
              void display() { cout<<“In Child Class \n”; }
};
int main()
{
             Child c;
             Parent &pb=c;
             pb.display();
             return 0;
}

What is the output of the following code snippet?
#include<iostream>
using namespace std;
class Parent
{
public:
             virtual void display() { cout<<” In Parent Class \n”; }
};
class Child: public Parent
{
public:
             void display() { cout<<“In Child Class \n”; }
};
int main()
{
                Parent *pc = new Child;
                pc->display();
                Parent &pb = *pc;
                pb.display();
                return 0;
}

What is the output of the following code snippet?

Where a function call can be substituted for its definition, it is referred to as?

What is the output of the following code snippet?
#include <iostream>
using namespace std;
void inline records(int a, int b)
{
    cout<<“a= “<< a<<“and b=”<< b<<”,”;
}
int inline squaredata(int x)
{
    return x*x;
}
int main()
{
     int data;
     records(1,4);
     data = squaredata(6);
     cout<<” square val=”<< data;
      return 0;
}

What is the output of the following code snippet?
#include <iostream>
using namespace std;
void inline records(char b)
{
   cout<<“value of b is:”<<b<<“,”;
}
int inline addition(char b)
{
   return b+b;
}
int main()
{
    char val=’D’;
    records(val);
    cout<<” Addition of ASCII Values are:”<<addition(val);
    return 0;
}