Classic HR "screening", which is usually generic questions that you can expect from someone in HR asking a technical person to answer. If you don't sound like a complete idiot, it's followed by two hours of online algorithmic testing that's scored, and also development that's evaluated by some mystery developer. In summary, it's at least a day, if not more, of interruptive work... and that's just to GET an interview. You will then wait weeks to hear back (while you could be accepting another position). It's about the least personable way I've ever seen a company interview someone, and I can't say it's a great way to really find the best people either. I can only imagine they came up with this process because the HR department got tired of filtering out candidates... but it also means they will lose really good ones.