Screwing up the technical interview - common mistakes
dandreamsofcoding.wordpress.com
dandreamsofcoding.wordpress.com
If the few minutes that it took to read this article is actually going to help people in an interview, then perhaps the interview method is wrong.
Posing a complex domain-specific unsolved (or else it would be in a library!) problem that requires using library functions just wastes time and adds clutter to a quick coiding sanity check.