16. stdout, stdin and stderr are ________
    

1. 1. Structure

   
   
   

   2. Streams

   
   
   

   3. File descriptors

   
   
   

   4. File pointers

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   File pointers

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17. Which of the following statements about stdout and stderr are true?
    

1. 1. stdout is line buffered but stderr is unbuffered

   
   
   

   2. Same

   
   
   

   3. Both connected to screen always

   
   
   

   4. Both connected to screen by default

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Both connected to screen by default

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18. What will be the output of the following C code?
    

    #include <stdio.h>
        int main()
        {
            FILE *fp = stdout;
            int num;
            fprintf(fp, "%d ", 105);
            fprintf(stderr, "%d ", 99);
            return 0;
        }
    

1. 1. Compilation Error

   
   
   

   2. 99 105

   
   
   

   3. 105 99

   
   
   

   4. Garbage value

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   105 99

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19. What will be the output of the following C code?
    

    #include <stdio.h>
        int main()
        {
            FILE *fp = stdout;
            int num;
            fprintf(fp, "%d\n ", 200);
            fprintf(stderr, "%d", 300);
            return 0;
        }
    

1. 1. Compilation Error

   
   
   

   2. 200

   
   
   

   3. 300

   
   
   

   4. 300
      200

   
   
   

   5. 200
      300

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: E

   200
   300

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