logo

CuriousTab

CuriousTab

Discussion


Home C Programming Declarations and Initializations See What Others Are Saying!
  • Question
  • In the following program where is the variable a getting defined and where it is getting declared?
    #include<stdio.h>
    int main()
    {
        extern int a;
        printf("%d\n", a);
        return 0;
    }
    int a=20;
    


  • Options
  • A. extern int a is declaration, int a = 20 is the definition
  • B. int a = 20 is declaration, extern int a is the definition
  • C. int a = 20 is definition, a is not defined
  • D. a is declared, a is not defined

  • Correct Answer
  • extern int a is declaration, int a = 20 is the definition 

    Explanation
    - During declaration we tell the datatype of the Variable.

    - During definition the value is initialized.


    More questions

    • 1. Bitwise can be used to reverse a sign of a number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 2. 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
    • 3. Bitwise can be used to generate a random number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 4. 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
    • 5. Bitwise & can be used to check if more than one bit in a number is on.

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

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

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 8. Bitwise | can be used to set multiple bits in number.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 9. Bitwise & can be used to check if a bit in number is set or not.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. A pointer union CANNOT be created

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


    Comments

    There are no comments.

Enter a new Comment