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Data Structures Interview Question:
Tell how to check whether a linked list is circular ?
Submitted by: AdministratorCreate two pointers, each set to the start of the list. Update each as follows:
while (pointer1)
{
pointer1 = pointer1->next;
pointer2 = pointer2->next; if (pointer2) pointer2=pointer2->next;
if (pointer1 == pointer2)
? ? ? ? ? ? {
print (”circularn”);
}
}
Submitted by: Administrator
while (pointer1)
{
pointer1 = pointer1->next;
pointer2 = pointer2->next; if (pointer2) pointer2=pointer2->next;
if (pointer1 == pointer2)
? ? ? ? ? ? {
print (”circularn”);
}
}
Submitted by: Administrator
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