It's well known in software engineering that many such graduates are not actually able to code. Standard practice is to have them code in the interview. I like to have them use an IDE since that's more realistic.
I suggest other disciplines do the same. In interview, give them some simple but real task that takes you 10 minutes and give them 30. Too many people sound like they know what they are talking about, then fail when given even the simple task.
Twitter does that. Try reloading the page, often times it will be available upon reload.
I can't find the "Buy Now" button
I hear that, I'm a long time terminal nerd and vim user. In these interviews I'm just happy to find candidates who aren't obvious sociopaths and can follow directions!