[eru]

No worries.

See https://news.ycombinator.com/item?id=27927159 for some more.

> May be he meant to use "invert binary tree" as a representative example of questions that typically asked.

Yes, that's a charitable and believable interpretation of his tweet.

(Though I don't know where he got that 90% figure from. Probably made up, like 85.12% of statistics.)

[6gvONxR4sf7o]

It’s a charitable interpretation, but seems super reasonable. Around that time, I think “inverting a binary tree” was a bit of a meme/shorthand about software interviewing.

[carnitine]

Was it? I thought that meme began from his post. To be totally blunt if you get asked to invert a binary tree in a FAANG interview, that’s very easy compared to most questions.