1. What is the most important benefit of using Kafka instead of RabbitMQ or AMQP? 
   1. Performance and scalability
   2. Routing and protocols
   3. Reliability
2. What are the most important differences between cold-path analytics and hot-path analytics?
   1. Cold-path analytics use real-time processing
   2. In hot-path analytics, data is processed before storage
   3. In cold-path analytics, data is stored and sent to the hot path
3. Why would you use a TSDB database rather than a SQL/NoSQL standard database to store time-series?
   1. Data-sharding
   2. It has a specific API to interpolate data and aggregate data
   3. Scalability and reliability