Gives you some code and a task with CodePair, ask about your idea and complete part of the code. Expect extensive questions about C++ 11/17/20. You can google documents for C++.

They ask difficult questions but, given the role they seemed fair. They are painfully slow about the process and I wasn't able to attend the final round interview due to a job deadline I had informed them about, which I had to commit to since they did not reach back soon enough. Later they informed me they'd like to continue but it was too late lol.