Yandex interview questions

Everything was smooth, and was done online. It was consisted of 4 stages: live-coding screening, live-coding, systems design, finals (meeting different teamleads and choosing a team). It was pretty hard, but I hustled through. Firstly I tried to apply to Java team, and my recruiter ensured me that there will be no java-specific questions, only general questions, language doesn't matter. It turned out it was not true, interviewer asked lots of things about java. After this failed interview, I said to my recruiter "after I learn the language and can we try again", then learned go, and after that applied to go vacancies. There were no go-specific questions, and only general knowledge. This was very strange. I think that it's very dependent on the team, it's not standartized as it should be :) So there are my questions that I was asked: