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C interview question:

What will be the output of the following code?


void main ()
{
   int i = 0 , a[3] ;
   a[i] = i++;
   printf (“%d",a[i]) ;
}


Answer:

The output for the above code would be a garbage value. In the statement a[i] = i++; the value of the variable i would get assigned first to a[i] i.e. a[0] and then the value of i would get incremented by 1. Since a[i] i.e. a[1] has not been initialized, a[i] will have a garbage value.