TikTok Software Developer interview questions

Some questions about machine learning, such as explaining KNN and tensor, and basic Pytorch implementation. Solving a medium leetcode question in 10 minutes. PS. the interviewer didn't show up for the first time.

I was interviewed by a staff software engineer. This interviewer asked about my previous experience, and Java/RabbitMQ/ElasticSearch. I was asked about scaling a service. The interviewer was experienced and had been in SG for a number of years. We took forty minutes to answer the question and I feel that he was in a rush at the end.