logo

CuriousTab

CuriousTab

Discussion


Home C Programming Library Functions See What Others Are Saying!
  • Question
  • What will be the output of the program?
    #include<stdio.h>
    #include<string.h>
    
    int main()
    {
        char dest[] = {97, 97, 0};
        char src[] = "aaa";
        int i;
        if((i = memcmp(dest, src, 2))==0)
            printf("Got it");
        else
            printf("Missed");
        return 0;
    }
    


  • Options
  • A. Missed
  • B. Got it
  • C. Error in memcmp statement
  • D. None of above

  • Correct Answer
  • Got it 

    Explanation
    memcmp compares the first 2 bytes of the blocks dest and src as unsigned chars. So, the ASCII value of 97 is 'a'.

    if((i = memcmp(dest, src, 2))==0) When comparing the array dest and src as unsigned chars, the first 2 bytes are same in both variables.so memcmp returns '0'.
    Then, the if(0=0) condition is satisfied. Hence the output is "Got it".


    More questions

    • 1. Bitwise | can be used to set a bit in number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 2. Can we have an array of bit fields?

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 3. By default structure variable will be of auto storage class

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 4. Bitwise can be used to reverse a sign of a number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 5. Is it necessary that in a function which accepts variable argument list there should be at least be one fixed argument?

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 6. Bitwise can be used to generate a random number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 7. A function that receives variable number of arguments should use va_arg() to extract the last argument from the variable argument list.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. Bitwise & can be used to check if more than one bit in a number is on.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. The preprocessor can trap simple errors like missing declarations, nested comments or mismatch of braces.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. It is necessary that a header files should have a .h extension?

    • Options
    • A. Yes
    • B. No
    • Discuss


    Comments

    There are no comments.

Enter a new Comment