Online Test

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What is the output of this program?

 #include <iostream.h>
    using namespace std;
    int func(int m = 10, int n)
    {
        int c;
        c = m + n;
        return c;
    }
    int main()
    {
        cout << func(5);
        return 0;
    }

What is the output of this program?

    #include <iostream>
    using namespace std;
    int main()
    {
        double a = 21.09399;
        float b = 10.20;
        int c ;
        c = (int) a;
        cout << c ;
        c = (int) b;
        cout << c ;
        return 0;
    }

What is the output of this program?

#include <iostream.h>
    using namespace std;
    int add(int a, int b);
    int main()
    {
        int i = 5, j = 6;
        cout << add(i, j) << endl;
        return 0;
    }
    int add(int a, int b )
    {
        int sum = a + b;
        a = 7;
        return a + b;
    }

 


What is the output of this program?

    #include <iostream.h>
    #include <deque.h> 
    using namespace std;
    int main ()
    {
        unsigned int i;
        deque<int> mydeque;
        mydeque.push_back ( 100 );
        mydeque.push_back ( 200 );
        mydeque.push_back ( 300 );
        for (deque<int> :: iterator it = mydeque.begin(); it != mydeque.end(); ++it)
            mydeque.clear();
        cout << ' ' << *it;
    }

What will happen while using pass by reference


 Where does the exceptions are used?


What is the output of this program?

   #include <iostream.h>
    using namespace std;
    const int SIZE = 10;
    class safe
    {
        private:
        int arr[SIZE];
        public:
        safe()
        {
            register int i;
            for (i = 0; i < SIZE; i++)
            {
                arr[i] = i;
            }
        }
        int &operator[](int i)
        {
            if (i > SIZE)
            {
                cout << "Index out of bounds" <<endl;
                return arr[0];
            }
            return arr[i];
        }
    };
    int main()
    {
        safe A;
        cout << A[5];
        cout  << A[12];
        return 0;
    }

What is the output of this program?

#include <iostream.h>
    using namespace std;
    #define PI 3.14159
    int main ()
    {
        float r = 2;
        float circle;
        circle = 2 * PI * r;
        cout << circle;
        return 0;
    }

What are mandatory parts in function declaration?


What will be the output of the following program?

#include<iostream.h> 
void MyFunction(int a, int b = 40)
{
    cout<< " a = "<< a << " b = " << b << endl;
}
int main()
{
    MyFunction(20, 30);
    return 0; 
}

What are the advantages of passing arguments by reference?


What is the output of this program?

    #include <iostream>
    using namespace std;
    long factorial (long a)
    {
        if (a > 1)
            return (a * factorial (a + 1));
        else
            return (1);
    }
    int main ()
    {
        long num = 3;
        cout << num << "! = " << factorial ( num );
        return 0;
    }

 What is the output of this program?

   #include <iostream.h>
    using namespace std;
    #define MAX 10
    int main()
    {
        int num;
        num = ++MAX;
        cout << num;
        return 0;
    }

What do we need to do to pointer for overloading the subscript operator?


Which of the following is false?


What is the output of this program?

    #include <iostream.h>
    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;
    }

 What is the output of this program?

#include <iostream.h>
    using namespace std;
    void mani()
    void mani()
    {
        cout<<"hai";
    }
    int main()
    {
        mani();
        return 0;
    }

Which operators are part of RTTI?


What is the output of this program?
 #include <iostream.h>
    using namespace std;
    void Values(int n1, int n2 = 10)
    {
        using namespace std;
        cout << "1st value: " << n1;
        cout << "2nd value: " << n2;
    }
    int main()
    {
        Values(1);
        Values(3, 4);
        return 0;
    }


How many parameters are required for sort_heap function?


How many specifiers are present in access specifiers in class?


What is the output of this program?

     #include <iostream.h>
    using namespace std;
    #define MIN(a,b) (((a)<(b)) ? a : b)
    int main ()
    {
        float i, j;
        i = 100.1;
        j = 100.01;
        cout <<"The minimum is " << MIN(i, j) << endl;
        return 0;
    }

Which option is best to eliminate the memory problem?


Given a class named Book, which of the following is not a valid constructor?


In C++, dynamic memory allocation is accomplished with the operator ____ 

 

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