AZ-204 Certification Practice Question #256

Question

You need to ensure receipt processing occurs correctly.
What should you do?

Accepted Answer

To prevent concurrent execution problems where multiple instances of a processor might attempt to process the exact same receipt concurrently, the system must utilize pessimistic concurrency. Under Azure Blob Storage, this is natively implemented using **Blob Leases**, which place an exclusive write/delete lock on the target blob for a specified duration (15 to 60 seconds, or infinite). This ensures that only the instance holding the lease can modify or finalize the receipt, successfully avoiding data race conditions and duplicate processing.

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