[joelbluminator]

> knew their CS fundamentals like the back of their hand.

Even if they did, that doesn't necessarily mean they can shuffle an array or flip a BST under pressure on a whiteboard

[foobiekr]

Honest to God, I think current interview practices suck and single out leetcode as particularly corrosive and demonstrating nothing about competence.

But I honestly can’t believe people are acting like reversing a binary tree is hard. This is like something you’d expect high school students with the most basic you data structures knowledge to be able to do.

[joelbluminator]

Once you've seen the solution it looks easy, yes.

[foobiekr]

No. Seriously no.