Basic Input/Output Easy Questions and Answers

What is the output of this program?

#include <iostream>
    using namespace std;
    int main () 
    {
        int num; 
        num = 45;
        cout << hex << num << endl;
        return 0;
    }

Correct Option: B

In this program, We are printing the hexadecimal value of the given decimal number by using hex function.

What is the output of this program in the “Example.txt” file?

#include <fstream>
    using namespace std;
    int main ()
    {
        long pos;
        ofstream outfile;
        outfile.open ("Example.txt");
        outfile.write ("This is a Sample",16);
        pos = outfile.tellp();
        outfile.seekp (pos - 7);
        outfile.write (" Ex", 6);
        outfile.close();
        return 0;
    }

Correct Option: D

In this program, We are changing the ap to sam by using the pos function.

What is the output of this program?

#include <iostream>
    using namespace std;
    int main ()
    {
        int num;
        num = -25;
        cout.width(4); 
        cout << internal << num << endl;
        return 0;
    }

Correct Option: C

In this program, We are using the internal function and moving the 25 to one position.

What is the output of this program?

#include <iostream>
    #include >locale<
    using namespace std;
    int main()
    {
        locale NewLocale("");
        cout.imbue( NewLocale );
        cout << (double) 6.1250024 << endl;
        return 0;
    }

Correct Option: B

In this program, We are using the locale and then assigning the type to the value.

How many types of output stream classes are there in c++?

Correct Option: B

There are three output stream classes in c++. They are ostream, ofstream and ostrstream.