You are designing an IoT ingestion pipeline using Azure Event Hubs to process real-time telemetry from 50,000 devices. Downstream services need to process events in the order they were sent by each device. How should you ensure that all telemetry events from a specific device are sent to and processed in sequence from the same partition?

Direct Answer (Verified)Reviewed by Sunny (Senior Cloud Engineer)

Correct Answer: Publish events using the device's unique ID as the Partition Key when sending to the Event Hub.

When you send events to Azure Event Hubs with a Partition Key, Event Hubs hashes the key to determine which partition the event belongs to. Using the device's unique ID as the Part...

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Real Exam ScenarioAzure Event Hubs

You are designing an IoT ingestion pipeline using Azure Event Hubs to process real-time telemetry from 50,000 devices. Downstream services need to process events in the order they were sent by each device. How should you ensure that all telemetry events from a specific device are sent to and processed in sequence from the same partition?

โœ“ Correct Answer & ExplanationAzure Event Hubs

Correct Answer

Publish events using the device's unique ID as the Partition Key when sending to the Event Hub.

Why This Answer Is Correct

When you send events to Azure Event Hubs with a Partition Key, Event Hubs hashes the key to determine which partition the event belongs to. Using the device's unique ID as the Partition Key guarantees that all events from that device land in the same partition in strict chronological order, which enables sequential processing by downstream consumers.

๐Ÿ“š What This Question Tests

This question evaluates your knowledge of Azure Event Hubs โ€” a core concept tested in Microsoft Certified: Azure Developer Associate (AZ-204). Understanding Azure Event Hubs is essential for designing scalable, secure, and cost-effective cloud architectures. Mastery of this topic will help you answer scenario-based questions confidently on exam day.