XAxamuel·Jun 18, 2015
It's still marketing. "Something you've done" could be the 'is-negative' repo that was briefly on the frontpage today [1], and the candidate could launch into a heart-rending speech on the virtues of modular programming. It doesn't say anything about whether they can actually program. Or "something you've done" could be an incredibly sophisticated engine and the candidate isn't good at marketing and comes off worse than the first guy, despite being a top-rate programmer.
[1] https://github.com/kevva/is-negative
In On Interviewing Software Engineers