I was actually asked 2 questions, neither of which was the "reverse a linked list" mentioned by other interviewees. Note that this was a theory question, with no coding involved in my case. I was initially asked to perform another operation on a linked list, and when I explained that I knew how to do that, I was asked to write a basic parser. The important part was showing how you would solve a problem that you have not seen before, and as such saying exactly what the questions are somewhat defeats the purpose. However, just know that it's a test of fundamentals, not a trick question or something like that.