AZ-204 Communication & Stakeholder Relations 3 — Questions and Answers
Question 1: Multiple microservices read from the same Azure Event Hubs event stream independently without affecting each other. What feature makes this possible?
- Consumer groups (Correct answer)
- Partition keys
- Capture feature
- Namespace geo-replication
Correct answer: Consumer groups
Each Event Hubs consumer group maintains its own offset, allowing multiple applications to read the full stream independently.
Question 2: A mobile app backend uses Azure Notification Hubs and needs to send a push notification only to users tagged as 'premium'. What should the developer use?
- Tag expressions in the send request (Correct answer)
- Template registrations with placeholders
- Installation namespaces
- Feedback service polling
Correct answer: Tag expressions in the send request
Notification Hubs tag expressions let you target specific device registrations by combining tags with AND/OR logic in the send request.
Question 3: An application uses Azure SignalR Service. A client must receive real-time updates pushed from the server without polling. Which programming model should the developer implement on the server?
- Hub with server-to-client method invocation (Correct answer)
- REST polling endpoint with long-polling
- WebJobs with timer trigger
- Service Bus topic subscription
Correct answer: Hub with server-to-client method invocation
SignalR Hubs allow the server to invoke named methods on connected clients in real time, enabling true server-push communication.
Question 4: A developer wants to automatically archive all Event Hubs events to Azure Blob Storage for offline analytics. Which feature should they enable?
- Event Hubs Capture (Correct answer)
- Event Hubs Auto-Inflate
- Diagnostic settings export
- Stream Analytics output
Correct answer: Event Hubs Capture
Event Hubs Capture automatically delivers streaming events to Azure Blob Storage or Data Lake in Avro format at configurable time/size intervals.
Question 5: A cross-platform mobile app sends push notifications via Azure Notification Hubs. To avoid maintaining platform-specific payloads, what should the developer use?
- Template registrations (Correct answer)
- Native registrations per platform
- Direct send with APNS format
- Shared access signature tokens
Correct answer: Template registrations
Template registrations let devices define their own payload format so the backend sends a single generic notification that Notification Hubs adapts per platform.
Question 6: A developer is building a chat application with Azure SignalR Service in Azure Functions using the serverless hosting mode. How does the client establish a connection?
- Negotiate with a function endpoint to get the SignalR connection info, then connect directly to the SignalR Service (Correct answer)
- Connect directly to the Azure Function URL using WebSockets
- Establish a Service Bus relay connection through the function
- Use an HTTP long-poll to the Azure Function every second
Correct answer: Negotiate with a function endpoint to get the SignalR connection info, then connect directly to the SignalR Service
In serverless mode, clients call a negotiate function to receive the SignalR Service endpoint and access token, then connect directly to the service.
Question 7: Messages sent to the same Event Hubs partition key always land in the same partition. Why is this important for an ordering-sensitive application?
- Events within a single partition are delivered in the order they were received (Correct answer)
- Partitions replicate events to all consumer groups simultaneously
- The same partition key enables geo-redundancy across regions
- Partition keys compress event payloads to reduce storage costs
Correct answer: Events within a single partition are delivered in the order they were received
Event Hubs guarantees ordering only within a single partition, so using a consistent partition key ensures related events are processed in order.
AZ-204 Communication & Stakeholder Relations 3
Multiple microservices read from the same Azure Event Hubs event stream independently without affecting each other.
What feature makes this possible?