Actually, among the MAGMA companies I've found the _least_ bias for leetcode-memorization at Amazon.
My interview with Meta was exactly as you described (a CS riddle taken from a textbook, to be solved without running the code or receiving hints). But in my interview with Amazon, each coding interview also included a couple leadership questions. If you want you can look up the exact questions that they'll give you to test what they call their "Leadership Principles"
Also the Amazon coding questions were not taken directly from Leetcode, and were easily reasoned out without prior knowledge of a special algorithm.
My interview with Meta was exactly as you described (a CS riddle taken from a textbook, to be solved without running the code or receiving hints). But in my interview with Amazon, each coding interview also included a couple leadership questions. If you want you can look up the exact questions that they'll give you to test what they call their "Leadership Principles"
Also the Amazon coding questions were not taken directly from Leetcode, and were easily reasoned out without prior knowledge of a special algorithm.