Welcome to your interview.
The question is on your right: Preprocessing for Gradient Boosting. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Given a dataset with missing values and categorical features, write a clean, modular pipeline to preprocess the data for a gradient boosting model.