first step of the interview is a phone call with an outsourced HR who reads you the questions and you have to answer them slowly so that he can write your answer to his computer. You can barely hear the interviewer and it makes the interview really unnatural. The interviewer was late of course. I would prefer to work for another company that does not consider its future employees like meat.

It was nice, informative. One should prepare using all resources. They will judge your understanding based on everything that you ever demonstrated in the process, so be aware of everything you said or mentioned.