Purpose-Built Database Selection Quiz

What you'll be asked

1. Which type of database is most suitable for a high-velocity application requiring sub-millisecond latency for simple key-value lookups?
2. An e-commerce platform needs to store product catalogs with varying attributes that frequently change. Which database model provides the most flexibility for this schema-less design?
3. You are designing a social networking feature that tracks 'friends-of-friends' relationships. Which database is architected to handle these complex, multi-hop queries efficiently?
4. A utility company needs to ingest millions of sensor readings per second to monitor grid performance over time. Which database category is the best fit?
5. When migrating a legacy monolithic application to a microservices architecture, why is it often recommended to move away from a single shared relational database towards a 'database-per-service' model?

Answers and explanations come after you submit.