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Home ‣ C Programming ‣ Pointers See What Others Are Saying!
  • Question

  • Which of the statements is correct about the program? 
    #include<stdio.h>

int main()
{
    float a=3.14;
    char *j;
    j = (char*)&a;
    printf("%d\n", *j);
    return 0;
}


  • Options
  • A. It prints ASCII value of the binary number present in the first byte of a float variable a.
  • B. It prints character equivalent of the binary number present in the first byte of a float variable a.
  • C. It will print 3
  • D. It will print a garbage value

  • Correct Answer
  • It prints ASCII value of the binary number present in the first byte of a float variable a. 

    • More questions

    • 1. It is necessary to call the macro va_end if va_start is called in the function.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 2. Left shifting a number by 1 is always equivalent to multiplying it by 2.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. What will be the output of the program? 
      #include<stdio.h>

int main()
{
    printf("%%%%\n");
    return 0;
}

    • Options
    • A. %%%%%
    • B. %%
    • C. No output
    • D. Error
      • Discuss
    • 4. A function that receives variable number of arguments should use va_arg() to extract arguments from the variable argument list.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. What will be the output of the program? 
      #include<stdio.h>
int main()
{
    float a = 0.7;
    if(0.7 > a)
        printf("Hi\n");
    else
        printf("Hello\n");
    return 0;
}

    • Options
    • A. Hi
    • B. Hello
    • C. Hi Hello
    • D. None of above
      • Discuss
    • 6. 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 sizeofargv, char *argv[])
{
    while(sizeofargv)
        printf("%s", argv[--sizeofargv]);
    return 0;
}

    • Options
    • A. sample friday tuesday sunday
    • B. sample friday tuesday
    • C. sunday tuesday friday sample
    • D. sunday tuesday friday
      • Discuss
    • 7. 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[2] );
    return 0;
}

    • Options
    • A. s
    • B. f
    • C. u
    • D. r
      • Discuss
    • 8. Point out the error in the program. 
      #include<stdio.h>

int main()
{
    const int k=7;
    int *const q=&k;
    printf("%d", *q);
    return 0;
}

    • Options
    • A. Error: RValue required
    • B. Error: Lvalue required
    • C. Error: cannot convert from 'const int *' to 'int *const'
    • D. No error
      • Discuss
    • 9. Bit fields CANNOT be used in union.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. What will be the output of the program (myprog.c) given below if it is executed from the command line?
      cmd> myprog 10 20 30 
      /* myprog.c */
#include<stdio.h>

int main(int argc, char **argv)
{
    int i;
    for(i=0; i<argc; i++)
        printf("%s\n", argv[i]);
    return 0;
}

    • Options
    • A. 10 20 30
    • B. myprog 10 20
    • C. myprog 10 20 30
    • D. 10 20
      • Discuss

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