Your question is DB Choice Trade-offs. 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).
Explain the trade-offs you consider when choosing a database for a new service, comparing SQL and NoSQL options.
Discuss how data shape, relationships, consistency, transaction requirements, query patterns, scale, latency, availability, operational burden, and cost affect the decision. Explain what clarifying questions you would ask, how you would validate the choice, and how you would plan for future migration or changing access patterns.