My favourite interview question for developers is "How many lines of code have you deleted?" Lots of junior developers boast about KLOC they have written. But the more code, the more bugs. I'm interested in knowing if the developer has lived with code, not just shipped it and moved on to the next project.
I'm both a programmer for and an administrator for network infrastructure at my university. So the code that I deploy I have to live with. A lot of it was written before I got there and I probably really have deleted just about as many lines as I have written. Decade-old Perl code usually needs to be updated. And now with us switching to IPv6, a lot of things need changing.
