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Here's some other senior dev's list: Don't know: start with Dan's list, it has many similarities. I know more Bash, but not enough to write a shell script more complex than my aliases file. I vaguely know z80 and 6502 assembly. I know Java extremely well, but am faking C++ and C#. I understand flexbox but not CSS floats. I don't even know what sockets and streams even are in this context, they don't sound like the so…
From your "do know" list you sound like a video game developer. I would think that a video game developer would be strongest in C++. Are you telling me your "do know" list is applied using Java?
Most of my games have been done in Java or Javascript.