Each accepted order must be processed once logically by the fulfillment worker fleet, with work retained while workers are offline. Which messaging topology fits the competing-worker requirement?

Choose the single best answer.

A.A Service Bus queue with competing Peek Lock consumers
B.A separate topic subscription for every fulfillment worker so every worker creates a shipment
C.An Event Hubs consumer group for every worker so every worker replays each order
D.A synchronous call to every worker before accepting the order

Show the answer and explanation

✓ Correct answer

A Service Bus queue with competing Peek Lock consumers

A queue distributes one logical work stream among competing receivers and retains pending work. Separate subscriptions or independent Event Hubs groups give each worker a copy rather than dividing fulfillment, while synchronous calls couple acceptance to every worker's availability. Processing still needs idempotency for redelivery. Source guide: PDF page(s) 49-50.

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