Q. 30 Consider the C code fragment given below.
typedef struct node
{
int data;
node* next ;
} node;
void join(node* m, node* n)
{
node* p = n;
while (p->next != NULL)
{
p = p->next;
}
p–>next = m;
}
Assuming that m and n point to valid NULL- terminated linked lists, invocation of join will
(A) append list m to the end of list n for all inputs
(B) either cause a null pointer dereference or append list m to the end of list n
(C) cause a null pointer dereference for all inputs.
(D) append list n to the end of list m for all inputs.
Answer: (B)
Explanation:
