AZ-204 Certification Practice Question #231

Question

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You are implementing an application by using Azure Event Grid to push near-real-time information to customers.

You have the following requirements:
•	You must send events to thousands of customers that include hundreds of various event types.
•	The events must be filtered by event type before processing.
•	Authentication and authorization must be handled by using Microsoft Entra ID.
•	The events must be published to a single endpoint.

You need to implement Azure Event Grid.

Solution: Publish events to an event domain. Create a custom topic for each customer.

Does the solution meet the goal?

Accepted Answer

The scenario requires sending events to thousands of customers, filtering them by event type, handling authentication via Microsoft Entra ID, and publishing to a single endpoint. Azure Event Grid Domains are designed precisely for this architecture: they provide a single publishing endpoint, support up to 100,000 topics (representing individual customers/tenants), and allow granular authentication/authorization using Microsoft Entra ID per topic. Despite the loose terminology of "custom topic" in the solution description (where "domain topic" is the technically precise term), both the Suggested Answer and the vast majority of the community agree that the solution concept of using an Event Domain meets the goal.

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