Amazon Interview Question

The question involved a common advertising-related machine learning binary classification problem. I answered it using the template from Alex Xu's book, with a lot of follow-up. Recalling various technical details about BERT and Transformer, how to handle unstructured data like text, and how to process imbalanced data, I was asked in depth about each question. The interviewer didn't cover many common machine learning basics, focusing on walking through case studies with the interviewer.