Question 1

You are designing an event-driven architecture for an e-commerce platform.

When a customer places an order, an 'OrderCreated' event is generated. This event must be delivered to three different microservices: Inventory, Billing, and Shipping.

Requirements:
- The event must be delivered reliably to all three services (publish/subscribe).
- If the Billing service is temporarily down, its messages must be retained until it comes back online.
- Messages must be processed in the exact order they were received.
- The system must support transactional processing.

Which messaging service should you recommend?

Accepted Answer

Match 'pub/sub', 'message retention', 'strict ordering', and 'transactions' to Service Bus Topics.

Question 2

What mistakes do candidates make on this AZ-305 question?

Accepted Answer

Choosing Event Grid because of the word 'event'. Event Grid does not retain messages long-term or guarantee strict FIFO ordering.

How to approach this question

Full Answer

Common mistakes

Practice the full Azure Solutions Architect Expert AZ-305 Practice Exam 1

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