I was contacted by a recruiter who found my resume on LinkedIn. I had a quick screening phone interview with the recruiter, followed by two technical phone interviews. During these technical interviews, we shared a collaborative text document so they could see what I typed. Each of the two interviews lasted about 45-60 minutes. Finally, I had a management interview that was somewhat shorter, lasting 30 minutes.

At this point, they decided to fly me to Facebook for on-site interviews. I was passed from my recruiter to a coordinator who organized the on-site schedule. I flew down the night before and left the evening afterwards. All meals, transportation, and lodging were paid for or expensed to Facebook.

The actual on-site interviews were fun. My coordinator gave me a brief tour, then led me into a (very) small conference room with whiteboards. I had four interviews in total, with lunch in-between with my coordinator. Each interview was about an hour long. One was with a manager. One was a coding interview. Two were systems-oriented, as this was an Applications Operations Engineering (aka Site Reliability Engineering, etc.) position.

Over the next several days, my coordinator was able to share a bunch of feedback from the interviewers. All four interviewers recommended a hire. I was told that there would be two meetings to make a decision: one with the AppOps team, and one with some higher-ups for final approval.

I was informed that they would keep my resume on file, but that they wouldn't be making me an offer shortly after the designated time for the second meeting. Though the message also stated that my coordinator would like to chat with me to discuss their decision, to date we've had trouble scheduling a time. Understandably, I suspect I'm less of a priority for the coordinator now that I'm not a candidate.

Overall, the experience was quite positive, and everyone I spoke to was great. Facebook genuinely seems like a great place to work. My only complaints thus far (in chronological order) are:

• My recruiter often took a week or more to respond to my messages. Partially, though by no means entirely, as a result of this, the interview process took several months.
• I found the CS interview questions, especially those on-site, to be disappointingly easy. This may have been due to time constraints, though.
• Because of the lengths of the interviews, I had relatively little time to ask questions of the interviewers. The one exception was my last interview of the day. Because there was nothing but a debrief with my coordinator afterwards, I was able to chat more with the interviewer. This gave me a lot more insight into Facebook and also resulted in him more strongly recommending a hire.
• To date, I haven't been able to pin my coordinator down for the reason I wasn't offered the position.

Overall, if you're given the opportunity to interview with Facebook, go for it. At the very least, the process is a lot of fun. And maybe you'll get a job at a great company!

Read text from a text file or stdin and tally the most common words.

Output, in order, the most common words present in the file.