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  • Question
  • What will be the output of the program?
    #include<stdio.h>
    int main()
    {
        int a = 500, b = 100, c;
        if(!a >= 400)
            b = 300;
        c = 200;
        printf("b = %d c = %d\n", b, c);
        return 0;
    }
    


  • Options
  • A. b = 300 c = 200
  • B. b = 100 c = garbage
  • C. b = 300 c = garbage
  • D. b = 100 c = 200

  • Correct Answer
  • b = 100 c = 200 

    Explanation
    Initially variables a = 500, b = 100 and c is not assigned.

    Step 1: if(!a >= 400)
    Step 2: if(!500 >= 400)
    Step 3: if(0 >= 400)
    Step 4: if(FALSE) Hence the if condition is failed.
    Step 5: So, variable c is assigned to a value '200'.
    Step 6: printf("b = %d c = %d\n", b, c); It prints value of b and c.
    Hence the output is "b = 100 c = 200"


    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


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