C++ Programming Mock Test 10

1. Which of the following is used to create a stream that performs both input and output operations?

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

    #include <iostream>
    #include <functional>
    #include <numeric>
    using namespace std;
    int myfunction (int x, int y) 
    {
        return x + 2 * y;
    }
    struct myclass 
    {
        int operator()(int x, int y) 
        {
            return x + 3 * y;
        }
    } myobject;
    int main () 
    {
        int init = 100;
        int numbers[] = {10, 20, 30};
        cout << accumulate (numbers, numbers + 3, init, minus<int>() );
        cout << endl;
        return 0;
    }

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

  
    #include <iostream>
    #include <iomanip>
    using namespace std;
    void showDate(int m, int d, int y)
    {
        cout << setfill('0');
        cout << setw(2) << m << '/'
        << setw(2) << d << '/'
        << setw(4) << y << endl;
    }
    int main()
    {
        showDate(1, 1, 2013);
        return 0;
    }

4. Which function is used to position back from the end of file object?

5. What will the monetary facet will do?

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

  
    #include <iostream>
    using namespace std;
    int main()
    {
        unsigned long x = 64;
        cout << x << oct << x << endl;
        return 0;
    }

7. Which of the following is not used as a file opening mode?

8. How many parameters are available in the function setbuf?

9. What is the signature of math in function using command line arguments?

10. How does the strings are stored in the memory?