Your question is Newsletter Send Optimization. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design an ML system and write ML pseudo-code to decide when and how to send newsletter emails to 10M customers for a small business, and explain how to evaluate the model performance.
Asked in the 技术电面 stage. A small business plans to send a newsletter to 10 million customers. Focus on the optimization logic, pseudo-code, and evaluation plan.