2k views

Consider the C function given below.

int f(int j)
{
static int i = 50;
int k;
if (i == j)
{
printf("something");
k = f(i);
return 0;
}
else return 0;
}


Which one of the following is TRUE?

1. The function returns $0$ for all values of $j$.
2. The function prints the string something for all values of $j$.
3. The function returns $0$ when $j = 50$.
4. The function will exhaust the runtime stack or run into an infinite loop when $j = 50$.

edited | 2k views

There is no updation for $i$ and $j$ in the function. so if we call function with $j = 50$ the recursive call will be continued infinitely. There is no terminating condition for recursion. hence answer D

by Boss (11k points)
edited by
0
Why answer can't be option a?
0

@rajatmyname because option a is strictly talking about all value of j but for 50 it will trapped in a loop

0

I have a small doubt.

In option D, it is clearly given that :

The function will exhaust the runtime stack or run into an infinite loop when j=50.

Consider only the underlined part. How at j=50, program will run into an infinite loop?

0
Because when j = 50, the loop condition will be true forever and the program will keep on executing, thus exhausting the stack.
0
Exactly my point...

The function will exhaust the runtime stack or terminate abnormally when j=50.
1. int f(int j)
{
2.   static int i = 50;
3. int k;
4.   if (i == j)
{
5.       printf("something");
6.       k = f(i);              key line function loop from 6 to 1 always when j=50  even not return 0. so 1st and 3rd statement are false.

return 0;
}
else return 0;
} 

since for value other then 50 it will not print anythng  b/c not satisfy if property.

so ans is D. since always same value pass as value.

by Veteran (63k points)
When j is 50, the function would call itself again and again as neither i nor j is changed inside the recursion.
by Loyal (9.9k points)
+1 vote

Option D by Junior (817 points)