I had an in-person interview which consisted of four, one-hour, one-on-one interviews. Two of the interviewers were managers, and the other two were individual contributors. The first question was write a function to determine whether or not two binary trees were mirrors of each other. I was also asked to write a hashtable in a language of my choice, but preferably not a language that has a native hashtable. I was also asked some data modeling questions by one of the interviewers. One interviewer also asked me to implement the itoa function in C. I was also asked to write a binary search (again, in a language of my choice).