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Home C Programming Expressions See What Others Are Saying!
  • Question
  • What will be the output of the program?
    #include<stdio.h>
    int main()
    {
        static int a[20];
        int i = 0;
        a[i] = i  ;
        printf("%d, %d, %d\n", a[0], a[1], i);
        return 0;
    }
    


  • Options
  • A. 1, 0, 1
  • B. 1, 1, 1
  • C. 0, 0, 0
  • D. 0, 1, 0

  • Correct Answer
  • 0, 0, 0 

    Explanation
    Step 1: static int a[20]; here variable a is declared as an integer type and static. If a variable is declared as static and it will be automatically initialized to value '0'(zero).

    Step 2: int i = 0; here vaiable i is declared as an integer type and initialized to '0'(zero).
    Step 3: a[i] = i ; becomes a[0] = 0;
    Step 4: printf("%d, %d, %d\n", a[0], a[1], i);
    Here a[0] = 0, a[1] = 0(because all staic variables are initialized to '0') and i = 0.
    Step 4: Hence the output is "0, 0, 0".


    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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