Welcome to your interview.
The question is on your right: SCD Types and SaaS Example. 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 is a Slowly Changing Dimension (SCD)? Explain the differences between Type 1, Type 2, and Type 3 SCDs, and provide a real-world SaaS scenario where you would implement Type 2.