https://news.ycombinator.com/user?id=icando9Hacker News RSShttps://hnrss.org/hnrss v2.1.1Fri, 19 Jun 2026 21:02:57 +0000IMHO, I don't think it requires any practice to be able to invert the binary tree. It is so trivial that it only requires a very basic level of programming skills. I agree whiteboard is generally broken, but for this particular case, I don't think Google is doing wrong. We can think another way, if some company hires people based on his reputation instead of the ability of doing actual work, I don't think it will survive. In this particular case, you just didn't show your ability of doing actual work, that's it. I am glad to see that Google prefers ability of doing actual work to reputation.

]]>Sat, 13 Jun 2015 00:48:26 +0000https://news.ycombinator.com/item?id=9709402icando9https://news.ycombinator.com/item?id=9709402https://news.ycombinator.com/item?id=9709402