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Functions - C Programming Questions and Answers

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  1. What will be the output of the program in 16 bit platform (Turbo C under DOS)?

     #include 
 
  int main() 
  {     
     int fun();  
     int i;    
     i = fun();    
     printf("%d\n", i);   
     return 0; 
 } 
 int fun()
 {     _
     AX = 1990;
 }

     

    2. A.

    Garbage value
    B.

    0 (Zero)
    C.

    1990
    D.

    No output

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  2. What will be the output of the program?

    #include
 void fun(int*, int*); 
 int main() 
{   
    int i=5, j=2;    
    fun(&i, &j);    
    printf("%d, %d", i, j);    
    return 0;
 }
 void fun(int *i, int *j) 
 {   
    *i = *i**i;    
    *j = *j**j; 
 }

    3. A.

    5, 2
    B.

    10, 4
    C.

    2, 5
    D.

    25, 4

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  3. What will be the output of the program?

    #include 
 int i;
 int fun();  

 int main() 
 {    
    while(i)     
    {        
        fun();       
        main();    
    }     
    printf("Hello\n");   
    return 0; 
 }
 int fun()
 {    
   printf("Hi");
 }

     

    4. A.

    Hello
    B.

    Hi Hello
    C.

    No output
    D.

    Infinite loop

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  4. What will be the output of the program?

    include 
 int reverse(int); 

 int main() 
 {   
     int no=5;    
     reverse(no);     
     return 0;
 }
 int reverse(int no)
 {    
    if(no == 0)       
       return 0;    
   else       
       printf("%d,", no);    
  reverse (no--);
 }

     

    5. A.

    Print 5, 4, 3, 2, 1
    B.

    Print 1, 2, 3, 4, 5
    C.

    Print 5, 4, 3, 2, 1, 0
    D.

    Infinite loop

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  5. What will be the output of the program?

     #include
 void fun(int); 
 typedef int (*pf) (int, int);
 int proc(pf, int, int);  

  int main() 
  {   
     int a=3;   
     fun(a);     
     return 0; 
 } 
 void fun(int n) 
 {     
     if(n > 0)    
     {       
        fun(--n);       
        printf("%d,", n);       
        fun(--n);    
   }
 }

     

    6. A.

    0, 2, 1, 0,
    B.

    1, 1, 2, 0,
    C.

    0, 1, 0, 2,
    D.

    0, 1, 2, 0,

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  6. What will be the output of the program?

    #include
 int sumdig(int); 
 int main()
 {     
    int a, b; 
    a = sumdig(123);   
    b = sumdig(123);   
    printf("%d, %d\n", a, b);    
    return 0; 
}
int sumdig(int n)
{    
   int s, d;    
   if(n!=0)   
   {
       d = n%10;        
       n = n/10;        
       s = d+sumdig(n);   
   }
 else      
      return 0;  
   return s;
}

     

    7. A.

    4, 4
    B.

    3, 3
    C.

    6, 6
    D.

    12, 12

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  7. What will be the output of the program?

    #include 
 int main() 
 {    
     void fun(char*);   
     char a[100];     
     a[0] = 'A'; a[1] = 'B';     
     a[2] = 'C'; a[3] = 'D';    
     fun(&a[0]);   
     return 0; 
} 
void fun(char *a) 
{     
    a++;   
    printf("%c", *a);  
    a++;    
   printf("%c", *a);
 }

     

     

    8. A.

    AB
    B.

    BC
    C.

    CD
    D.

    No output

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  8. What will be the output of the program?

    #include 
 int main()
 {
     int fun(int);    
     int i = fun(10); 
     printf("%d\n", --i);  
     return 0; 
}
int fun(int i) 
{   
    return (i++); 
}

     

    9. A.

    9
    B.

    10
    C.

    11
    D.

    8

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  9. What will be the output of the program?

    #include
 int check (int, int); 

 int main() 
 {   
    int c;   
    c = check(10, 20);    
    printf("c=%d\n", c);    
    return0;
} 
int check(int i, int j)
{    
    int *p, *q;  
    p=&i;     
    q=&j;    
    i>=45 ? return(*p): return(*q); 
}

    10. A.

    Print 10
    B.

    Print 20
    C.

    Print 1
    D.

    Compile error

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  10. What will be the output of the program?

    #include 

 int main() 
 {    
    int i=1;    
    if(!i)        
       printf("FRESHERGATE,");    
    else    
    { 
      i=0;      
      printf("C-Program");     
      main();   
    }
  return 0;

 }

     

     

    11. A.

    prints "FRESHERGATE, C-Program" infinitely
    B.

    prints "C-Program" infinetly
    C.

    prints "C-Program, FRESHERGATE" infinitely
    D.

    Error: main() should not inside else statement

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