That’s what happens when a company asks their “Rockstar” developer to write them a few interview questions. Whatever thing they just learned recently they would delve into in great depth. I just learned about binary packing! Guess what’s going to be on the test.

A lot of good developers don’t even pseudocode all that well on the whiteboard.

Of course you also end up with a lot of people that have hearsay knowledge. How would you optimize this communication stack? Oh I’d go web sockets and then switch over to UDP after the connection initializes. They have a conversation with you about how “they” did it at their last company and it solved all the problems. Then 3 months into the project you find out that they have no idea how to pull it off and they were just repeating what they heard in a scrum.