I interviewed for the lead engineer role. Question was LeetCode medium level, which I had no difficulty coming up with a solution. I am unsure why I was rejected. They required me to code it, compile it, run it and write unit tests for the same and ensure the tests pass successfully. I presented my solution.

While writing, I wanted to refer how to split my string using string.split. As far as I understand, anyone should be able to look that up without being considered a negative aspect. Other than that, I coded the whole thing, ran it (which I think is ridiculous to do but still did). I also explained my testing strategy and ran 90% of the unit tests successfully. Is this not enough these days to accept an experienced candidate? What has this industry come down to?

Standard LeetCode medium. Unit tests.

How to solve this problem. Code it, run it and ensure all tests pass.