Meta doesn't use Leetcode for technical interviews, although they do suggest it for preparation. They don't even compile what is written. Another human being watches another human being write and explain code in a shared text editor for correctness and efficiency.
I was "warned" for mirroring Oracle RDMS documentation that the course used. Subsequently, they ditched the commercial solution and replaced it with Postgres.<p>They also migrated from using MINIX 2 as a teaching OS to FreeBSD.
I wish him well. It’s possible to do this without ever being possible to catch. Have considered building such a device, but now that I see the backlash, I’ll hold off.