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  • Question

  • Point out the error, if any in the while loop. 
    #include<stdio.h>
int main()
{
    int i=1;
    while()
    {
        printf("%d\n", i++);
        if(i>10)
           break;
    }
    return 0;
}


  • Options
  • A. There should be a condition in the while loop
  • B. There should be at least a semicolon in the while
  • C. The while loop should be replaced with for loop.
  • D. No error

  • Correct Answer
  • There should be a condition in the while loop 

    Explanation
    The while() loop must have conditional expression or it shows "Expression syntax" error.

    Example: while(i > 10){ ... }

    More questions

    • 1. What are the types of linkages?

    • Options
    • A. Internal and External
    • B. External, Internal and None
    • C. External and None
    • D. Internal
      • Discuss
    • 2. Out of fgets() and gets() which function is safe to use?

    • Options
    • A. gets()
    • B. fgets()
      • Discuss
    • 3. A structure can be nested inside another structure.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. What will be the output of the program (sample.c) given below if it is executed from the command line?
      cmd> sample one two three 
      /* sample.c */
#include<stdio.h>

int main(int argc, char *argv[])
{
    int i=0;
    i+=strlen(argv[1]);
    while(i>0)
    {
        printf("%c", argv[1][--i]);
    }
    return 0;
}

    • Options
    • A. three two one
    • B. owt
    • C. eno
    • D. eerht
      • Discuss
    • 5. Which of the following statement is True?

    • Options
    • A. User has to explicitly define the numeric value of enumerations
    • B. User has a control over the size of enumeration variables.
    • C. Enumeration can have an effect local to the block, if desired
    • D. Enumerations have a global effect throughout the file.
      • Discuss
    • 6. Point out the error in the program? 
      struct emp
{
    int ecode;
    struct emp *e;
};

    • Options
    • A. Error: in structure declaration
    • B. Linker Error
    • C. No Error
    • D. None of above
      • Discuss
    • 7. Point out the error in the program? 
      #include<stdio.h>

int main()
{
    union a
    {
        int i;
        char ch[2];
    };
    union a z1 = {512};
    union a z2 = {0, 2};
    return 0;
}

    • Options
    • A. Error: invalid union declaration
    • B. Error: in Initializing z2
    • C. No error
    • D. None of above
      • Discuss
    • 8. Point out the error in the program? 
      struct emp
{
    int ecode;
    struct emp e;
};

    • Options
    • A. Error: in structure declaration
    • B. Linker Error
    • C. No Error
    • D. None of above
      • Discuss
    • 9. What will be the output of the program (sample.c) given below if it is executed from the command line?
      cmd> sample friday tuesday sunday 
      /* sample.c */
#include<stdio.h>

int main(int argc, char *argv[])
{
    printf("%c", **++argv);
    return 0;
}

    • Options
    • A. s
    • B. f
    • C. sample
    • D. friday
      • Discuss
    • 10. What is the purpose of fflush() function.

    • Options
    • A. flushes all streams and specified streams.
    • B. flushes only specified stream.
    • C. flushes input/output buffer.
    • D. flushes file buffer.
      • Discuss

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