Design and Implement Multi-Region Writes DP-420 Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A company uses Azure Cosmos DB for NoSQL with multi-region writes. They have a container with a custom conflict resolution policy that uses a stored procedure. The stored procedure is designed to merge conflicting documents. The company wants to ensure that conflicts are resolved automatically without manual intervention. What should they verify?

   • AThe stored procedure is registered with the container and is error-free.
   • BThe account has multi-region writes enabled.
   • CThe container has a partition key that matches the conflict resolution policy.
   • DThe consistency level is set to Strong.
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2. 17foundation · easy

   Which statement correctly describes a benefit of enabling multi-region writes in Azure Cosmos DB?

   • AIt improves write availability by allowing writes to be accepted in any region that is part of the multi-region write configuration.
   • BIt reduces the need for client-side retry logic because all writes are guaranteed to succeed on the first attempt.
   • CIt ensures that all regions have the same data at all times with no replication lag.
   • DIt increases the maximum storage capacity of the account by allowing data to be stored in multiple regions.
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4. 18application · medium

   A logistics company is deploying a tracking application using Azure Cosmos DB for NoSQL. The application will be used by dispatchers in multiple regions who need to update shipment status in real time. The company wants to ensure that write operations are acknowledged quickly in the region where the dispatcher is located, and that the system can continue to accept writes if one region becomes unavailable. They have decided to enable multi-region writes. What is a primary benefit of this configuration?

   • AThe system can reduce the number of regions required for the account.
   • BThe system can automatically redirect writes to a read-only region during an outage.
   • CWrite operations are replicated synchronously to all regions, ensuring immediate consistency.
   • DWrite operations are acknowledged by the nearest region, reducing latency for dispatchers.
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5. 19foundation · easy

   What is the first step to enable multi-region writes for an existing Azure Cosmos DB account?

   • AAdd at least one more region to the account.
   • BChange the consistency level to Strong.
   • CSet the account's write region to the primary region.
   • DCreate a new container with a custom conflict resolution policy.
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6. 20expert · hard

   A company uses Azure Cosmos DB for NoSQL with multi-region writes. The application stores user preferences. The company wants to use a custom conflict resolution policy that merges conflicting documents. The development team has written a stored procedure and wants to test it. What should you do to test the conflict resolution policy?

   • AUse the .NET SDK to call the stored procedure directly.
   • BUse the Azure portal to run the stored procedure against a sample document.
   • CEnable multi-region writes and then use the change feed to verify the merge.
   • DSimulate a conflict by writing the same document to two different regions simultaneously and then query the conflict feed.
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