[tomtung]

My previous employer used something very similar: either adding small features or fixing known bugs of a past build of some open source software in 1-1.5hrs. We prepared one such interview question for each supported language (C++, Python, and Java), and, to help calibration, each question consisted of a series of requirements that required progressively more complex changes.

Both interviewees and interviewers seemed to like these questions. I do hope this approach gets more adoption in the industry. It takes more time to prepare, but the high-quality signals it provides are worth the effort imo. Such questions are also harder to leak compared to typical whiteboard coding questions and thus more reusable too.