Welcome to your interview.
The question is on your right: Deep Model vs Tree Model for CTR. 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.
What are the trade-offs between training a deep neural network and using a simpler tree-based model for real-time click-through rate prediction at Tinder?