C-Plus-Plus Questions

March 21, 2023
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C-Plus-Plus Questions

1 / 15

1. Which part of memory is used for the allocation of local variables declared inside any function.

2 / 15

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

 #include 
    using namespace std;
    class Rect
    {
        int x, y;
        public:
        void set_values (int,int);
        int area ()
        {
            return (x * y);
        }
    };
    void Rect::set_values (int a, int b) 
    {
        x = a;
        y = b;
    }
    int main ()
    {
        Rect recta, rectb;
        recta.set_values (5, 6);
        rectb.set_values (7, 6);
        cout << "recta area: " << recta.area();
        cout << "rectb area: " << rectb.area();
        return 0;
    }

3 / 15

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

        #include 

        #include 

        #include 

        using namespace std;

        int main ()

        {

            string mystr;

            float price = 0;

            int quantity = 0;

            cout << "Enter price: ";

            getline (cin, mystr);

            stringstream(mystr) >> price;

            cout << "Enter quantity: ";

            getline (cin, mystr);

            stringstream(mystr) >> quantity;

            cout << "Total price: " << price * quantity << endl;

            return 0;

        }

4 / 15

4. Which one of the following is the correct definition of the "is_array();" function in C++?

5 / 15

5. what will be the output of the following C++ code snippet?

int main() 
{
int i=0,x=0;

for(i=1;i<10;i*=2)
{
    x++;
    cout<

6 / 15

6. Would destructor be called, if yes, then due to which vector? 

#include 
#include 
using namespace std;
 
class a
{
public :
    ~a()
    {
        cout << "destroy";
    }
};
int main()
{
   vector  *v1  = new vector;
   vector  *v2  = new vector;
   return 0;
}

7 / 15

7. What is the use of is_same() function in C++?

8 / 15

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

        #include 

        using namespace std;

        void Sum(int a, int b, int & c)

        {

            a = b + c;

            b = a + c;

            c = a + b;

        }

        int main()

        {

            int x = 2, y =3;

            Sum(x, y, y);

            cout << x << " " << y;

            return 0; 

        }

9 / 15

9. Read the given C++ program carefully and choose the correct output from the given options:

#include   
#include   
using namespace std;  
int main()  
{  
    cout<::value; // Case A  
    cout<::value;   // Case B  
    cout<::value; //Case C  
    return 0;  
}

10 / 15

10. What is the use of the indentation in c++?

11 / 15

11. Where does the return statement returns the execution of the program?

12 / 15

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

#include 
    using namespace std;
    class Box
    {
        public :
        double length;
        double breadth;
        double height;
    };
    int main( )
    {
        Box Box1;
        double volume;
        Box1.height = 5;
        Box1.length = 6;
        Box1.breadth = 7.1;
        volume = Box1.height * Box1.length * Box1.breadth;
        cout << "Volume of Box1 : " << volume <

13 / 15

13. Pick the incorrect statement about inline functions in C++?

14 / 15

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

#include 
using namespace std; 
template 
T max (T &a, T &b)
{
	cout << "Template Called ";
    return (a > b)? a : b;
}
 
template <>
int max  (int &a, int &b)
{
    cout << "Called ";
    return (a > b)? a : b;
}
 
int main ()
{
    int a = 10, b = 20;
    cout << max  (a, b);
}

15 / 15

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

#include 
#include 
using namespace std;
int main()
{
	cout<::value;
	cout<::value;
	cout<::value;
	return 0;
}

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