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C Programming :: Declarations and Initializations

Declarations and Initializations - General Questions
Declarations and Initializations - MCQ Set 1
Declarations and Initializations - Point Out Errors
Declarations and Initializations - Yes / No Questions
Declarations and Initializations - Find Output of Program
Declarations and Initializations - True / False Questions
Declarations and Initializations - Point Out Correct Statements

  1. What will be the output of the program?

    #include 
int main()
 {   
     int X=40;    
     {        
         int X=20;       
         printf("%d ", X);    
     }     
     printf("%d\n", X);  
     return 0; 
 }

     

    2. A.

    40 40
    B.

    20 40
    C.

    20
    D.

    Error

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  2. In the following program where is the variable a getting defined and where it is getting declared?

     #include
 int main() 
 {
     extern int a;    
     printf("%d\n", a);   
     return 0;
  } 
  int a=20;

    3. 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

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  3. When we mention the prototype of a function?

    4. A.
    Defining
    B.
    Declaring
    C.
    Prototyping
    D.
    Calling

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