C++ Programming MCQ - File Handling

11. What will be the output of the following program?

         
Note:Includes all required header files
using namespace std;
 
int main() 
{
   ofstream ofile; 
   ofile.open ("find.txt"); 
   ofile << "letsfindcourse" << endl;
   cout << "Data written to file" << endl;
   ofile.close(); 
   return 0;
}  

A. Compile error
B. Runtime error
C. The program prints ""letsfindcourse"" in the file find.txt
D. none of the above

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12. What is the output of this program?

         
Note:Includes all required header files
 using namespace std;
    int main ()
    {
        char fine, course;
        cout << "Enter a word: ";
        fine = cin.get();
        cin.sync();
        course = cin.get();
        cout << fine << endl;
        cout << course << endl;
        return 0;
    }

A. course
B. fine
C. Returns fine 2 letter or number from the entered word
D. None of the mentioned

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13. What is the output of this program?

        
Note:Includes all required header files 
          
using namespace std;
    int main () 
    {
        ofstream outfile ("find.txt");
        for (int i = 0; i < 70; i++)
        {
            outfile << i;
            outfile.flush();
        }
        cout << "Done";
        outfile.close();
        return 0;
    }       

A. Done
B. Error
C. Runtime error
D. None of the mentioned

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14. What is the output of this program?

         
Note:Includes all required header files

 using namespace std;
    int main ()
    {
        int p = 1000;
        double q = 3.14;
        cout << p;
        cout << endl;
        cout << q << endl << p * q;
        endl (cout);
        return 0;
    }

A. 1000
B. 3.14
C. 3140
D. All of the above

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15. Which of the following is true about the following program

         
Note:Includes all required header files
using namespace std;
    int main () 
    {
            char i;
        streambuf * p;
        ofstream of ("find.txt");
        pbuf = of.rdbuf();
        do {
            i = cin.get();
            p -> sputc(i);
        } while (i != '.');
        of.close();
         return 0;
    }

A. insertion operator
B. $ symbol
C. dot operator
D. none of the mentioned

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16. What will be the output of this program?

         
Note:Includes all required header files
using namespace std;
    int main ()
    {
        int p = 10;
        double q = 1.14;
        
        cout << p + q;
        endl (cout);
        return 0;
    }

A. 10
B. 1.14
C. 11.14
D. All of the above

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17. What will be the output of this program?

        
Note:Includes all required header files
 using namespace std;
    int main () 
  
{
    FILE *fp;
    char x[1024];
    fp = fopen("find.txt", "r");  // "ayushjain and prateek" 
    x[0] = getc(fp);              
    fseek(fp, 0, SEEK_END);        
    fseek(fp, -7L, SEEK_CUR);      
    fgets(x, 6, fp);             
    puts(x);                     
    return 0;
} 

A. ayushj
B. yushja
C. ayushja
D. prate

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18. In fopen(), the open mode "wx" is sometimes preferred "w" because. i) Use of wx is more efficient. ii) If w is used, old contents of file are erased and a new empty file is created. When wx is used, fopen() returns NULL if file already exists.

A. Only i
B. Only ii
C. Both i & ii
D. None of the above

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19. Which member function is used to determine whether the stream object is currently associated with a file?

A. is_open
B. Buf
C. String
D. None of the above

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20. getc() returns EOF when

A. End of files is reached
B. When getc() fails to read a character
C. Both A & B
D. None of the above

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