26. What does the following command line signify?
    

    prog1|prog2
    

1. 1. It runs both the programs, pipes output of prog2 to input of prog1

   
   
   

   2. It runs prog1 first, prog2 second

   
   
   

   3. It runs prog2 first, prog1 second

   
   
   

   4. It runs both the programs, pipes output of prog1 to input of prog2

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   It runs both the programs, pipes output of prog1 to input of prog2

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27. For a typical program, the input is taken using _________.

1. 1. Files

   
   
   

   2. Command-line

   
   
   

   3. scanf

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   For a typical program, the input is taken using Files, Command-line and scanf.

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28. Which among the following is the odd one out?

1. 1. fprintf

   
   
   

   2. scanf

   
   
   

   3. printf

   
   
   

   4. putchar

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   scanf

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

    #include <stdio.h>
    #include <string.h>
        int main()
        {
            char line[];
            fgets(line, 25, stdin);
            printf("%d\n", strlen(line));
            return 0;
        }
    

1. 1. 25

   
   
   

   2. Any length since line did not end with null character

   
   
   

   3. Compilation Error

   
   
   

   4. Runtime Error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Compilation Error
   

   main.c: In function ‘main’:
   main.c:5:14: error: array size missing in ‘line’
            char line[];
   

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30. gets() and puts() operate on ___________
    

1. 1. nothing

   
   
   

   2. stderr

   
   
   

   3. files

   
   
   

   4. stdin and stdout

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   stdin and stdout

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