A recruiter found my resume online and emailed me, asking if I would be interested in opportunities with Facebook. We then spoke on the phone, and she scheduled my first technical interview. Throughout the process, the HR person was very friendly and helpful.

The technical interviews were conducted using Skype and collabedit.com. They consisted mostly of algorithms and data structures questions, and a few questions about projects I had mentioned on my resume.

The first two interviewers were very friendly and positive, and I felt the interviews went very well, having answered all the questions correctly.

The last interview was conducted by a grumpy engineer with a thick accent who was running 15 minutes late and sounded like he didn't want to be there. Unfortunately, this put me off quite a bit, and I did not perform very well in that interview. Three days later, I heard back from HR that they wouldn't be proceeding with on-site interviews in Palo Alto.

Print a singly-linked list backwards, in constant space and linear time.

Convert a binary search tree to a sorted, circular, doubly-linked list, in place (using the tree nodes as the new list nodes).

Given a set of words, group them into sets of anagrams.

Given a string, remove all the duplicate characters (not necessarily consecutive).