Exactly. The OP thinks that when I ask her to reverse a linked list, I expect her to whip out the perfect code from memory on the fly. I would be even more suspicious if you did that actually. I want you to structure the data. I want you to try out variants of reversing. It is ok if you can't give me the optimal solution in 5 minutes, as long as you demonstrate the capability to reason with data structures and pointers and tools at hand.