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I recently interviewed for a position at twitter as a front end engineer (API stuff, HTML, CSS, etc). I failed out as well, but it was on, I think, much more nuanced terms. The interviewer had me write a client jsonp API interface, that is a controller that would handle calls to and from a jsonp API. Embarrassingly, I knew little about jsonp except for that it has a callback parameter that correlates with a global function you have defined in the javascript of your page. So as I was literally learning how JSONP worked during this interview, I also had to write an interface that would gracefully fail and queue multiple calls. I did pretty well, at that, having completed the essence of the exercise. Toward the end, I got mentally hung up on a scope issue and my brain was pretty much fried at that point so I ended up crashing out (it was the end of the interview time, anyway, so it's not like there was then 10 minutes of awkward silence). Anyway, this sma hiccup, which in no way indicated I didn't know my craft, and opposing my seemed to indicate I was an extremely quick study, still managed to keep me from moving on in the process. I'm not miffed or anything. In fact, out of that experience, I wrote a really cool lazy loading geolocation API that uses promises in conjunction with JSONP to deliver a really smooth API consumer experience, something I wouldn't have thought to do at my previous level of understanding. |