Recently I decided to move from contracting to full time work as the job market is balls here in the Bay currently for Contracts. Twitter was one of the companies which I applied and I had the pleasure of having a "phone screen" with them for a senior unix position. Here's what this screen was, a basic unix question, that any lunix user could get. A more intermediate type question that could trick some people. And finally their *BIG SCREEN* a tricky question that was based on esoteric knowledge that had absolutely nothing to do with one's ability to perform the job.
The person calling me was just reading these off a list, she didn't know why they were picked and was only able to write down the answers. Here's the hilarious part, I informed her that the question was silly and there's no reason anyone should really care about this sort of information except in extreme situations. That this was the question that lead me to believe they had a culture of primadonnas. She diligently wrote all this down, in case they still wanted to talk to me.
But here's the REAL kicker, their stupid asinine esoteric question? Was wrong. They had the phrasing wrong... what they were asking and looking for in an answer were not the same things. Being a pedantic asshole, in my followup to tell them what I thought of their process I pointed this out. Never heard anything back ;) Wonder if they have fixed their question yet?