[zAy0LfpBZLC8mAC]

I'd tend to agree with lazyjones. I doubt that his expectation is that you would know all the tricks for making the most efficient integer => string conversion routine ever, but I certainly would expect any competent programmer to be able to write an integer => string conversion routine without really thinking about it, not because anyone needs to write such code much anymore, but simply because a competent programmer should have sufficient mathematical understanding to see the obvious solution to the problem. This isn't about writing string handling code, but about demonstrating understanding of very basic mathematics using a trivial problem that should need a line or two of code in most programming languages to solve.