Event-Driven Architectures CV0-004 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which component in an event-driven architecture is responsible for detecting a state change and publishing an event?

   • AEvent broker
   • BEvent schema
   • CEvent consumer
   • DEvent producer
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   What is the primary responsibility of an event consumer in an event-driven architecture?

   • ATo generate events when a state change occurs.
   • BTo subscribe to and process events of interest.
   • CTo route events to the appropriate destination.
   • DTo store all events for historical analysis.
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A team is migrating a legacy system to an event-driven microservices architecture. They are concerned about the learning curve and the operational complexity of managing an event broker. They also need to ensure that events are not lost during broker failures. Which strategy best addresses these concerns?

   • AUse a managed event broker service with built-in replication and durability.
   • BUse a simple message queue with no persistence to reduce complexity.
   • CAvoid using a broker and use direct HTTP calls between services.
   • DImplement a custom broker in-house to have full control.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A company is refactoring a monolithic application into microservices. They want to ensure that when a user updates their profile, the notification service and the analytics service both react without the profile service knowing about them. Which integration pattern should they use?

   • AHave the notification and analytics services call the profile service periodically to check for updates.
   • BPublish a 'profile.updated' event to a broker, and have notification and analytics subscribe to it.
   • CDirect REST calls from the profile service to each downstream service.
   • DUse a shared database where the profile service writes and the other services poll for changes.
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   A financial trading platform processes millions of market data events per second. They need to detect arbitrage opportunities by correlating events across multiple exchanges in real time, and also maintain a complete audit trail for regulatory compliance. The team is considering an event-driven architecture. Which combination of event processing and storage best meets these requirements?

   • AUse simple event processing for each event, and store events in a message queue that deletes them after consumption.
   • BUse complex event processing for real-time correlation, and store raw events in a log-based broker with retention for replay.
   • CUse stream processing for correlation, and store only aggregated results in a database.
   • DUse batch processing for correlation, and store events in a data lake for later analysis.
   Reveal Solution Discussion Select an answer first