Comment by ceeplusplus

Sorry, but this just sounds very easy to bullshit. Unless you're doing real in depth quizzing of stuff people wouldn't know if they didn't work with it (e.g. in HFT, explaining what a potential implementation of std::string could be and what the tradeoffs of each design choice would be), generic backend principles are very easy to spew correct answers for without actually knowing how to code. How are you going to filter out people that just memorize the concepts for their chosen language and are good at talking but can't code for their life?