Microsoft Azure Architect Design (AZ-301) Practice Exam

Using Azure Event Hubs is the appropriate choice for capturing user creation and role assignment data because it is a highly scalable data streaming platform and event ingestion service. Event Hubs is designed for handling large volumes of data from various sources, enabling applications to process and analyze data in real time. This makes it ideal for capturing events related to user activities such as creation and role assignments.

When an event occurs, such as the creation of a user or an update to a role assignment, Event Hubs can receive and store these events in a centralized manner. After processing, these events can be routed to various destinations, including Azure Cosmos DB for persistent storage, allowing for further analysis or integration with other applications.

The other services mentioned play unique roles but do not align as closely with the requirement to capture and store user creation and role assignment data in a central data store like Azure Cosmos DB. Azure Functions can be used for serverless compute and can process events, but it does not handle event ingestion at scale as effectively as Event Hubs. Azure Log Analytics focuses on data collection from various sources employed for diagnostics and monitoring rather than streaming events. Azure Notification Hubs are designed for sending push notifications rather than capturing and storing event data. Therefore, Event Hubs is the