I didn't apply for this position, but on May 24th, I received an email from HR inviting me for an interview. Without any preparation, I decided to give it a try.
First round (5/29): The entire interview was conducted in Chinese. It started with a self-introduction and a discussion about my career path, followed by an introduction of the projects on my resume. Then, I was asked some simple probability questions and SQL queries. I didn't need to write any code, just provide a brief explanation of my thought process. For example, how many times on average would a uniform distribution sample be greater than a certain number, or how to randomly select 10% of users using SQL. Then there was a case study, asking how to design metrics and experiments to analyze if a decrease in user numbers is observed. I initially responded that retention rate could be used as a metric, and suggested conducting experiments by grouping users before and after the decline. The interviewer then mentioned that this approach only applies to sudden drops and asked how to analyze long-term declines. I basically rambled and didn't answer well. The last few minutes were for questions, and I asked about the specific responsibilities of the position.
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