Design and Implement Multi-Region Writes DP-420 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Why is conflict resolution necessary when multi-region writes are enabled in Azure Cosmos DB?

   • ABecause the consistency level must be changed to Strong to avoid conflicts.
   • BBecause the SDK requires a conflict resolution policy to connect to multiple regions.
   • CBecause replication lag causes data loss that must be recovered.
   • DBecause multiple regions can write to the same item concurrently, leading to conflicting versions.
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2. 22expert · hard

   A financial services company is using Azure Cosmos DB for NoSQL with multi-region writes across two regions. They have a container that stores transaction documents. The company has a custom conflict resolution policy using a stored procedure. During a recent regional outage, they noticed that some conflicts were not resolved by the stored procedure and were written to the conflicts feed. The development team needs to understand why this happened. What is the most likely reason?

   • AThe stored procedure failed to execute due to a runtime error.
   • BThe stored procedure was not registered with the container.
   • CThe conflicts feed is only populated when the consistency level is set to Strong.
   • DThe conflict was between two documents with different partition keys.
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4. 23application · medium

   A global e-commerce company is deploying a new product catalog to Azure Cosmos DB for NoSQL. The application will be accessed by customers in North America, Europe, and Asia Pacific. The company requires that write operations be acknowledged by the region closest to each customer to minimize perceived latency, and that the system remain available for writes even if one regional datacenter fails. The solution architect has decided to use multi-region writes. Which additional configuration is required to support this design?

   • ASet the write region to the nearest region using the Azure CLI and enable service-managed failover.
   • BConfigure the default consistency level to Strong and enable automatic failover.
   • CEnable the multi-region writes account property and add all three regions to the account.
   • DCreate a separate Cosmos DB account in each region and replicate data using Azure Data Factory.
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5. 24expert · hard

   A company is planning to enable multi-region writes on an Azure Cosmos DB for NoSQL account. The account currently has a single write region and uses the default conflict resolution policy. The application has a container that stores product reviews. The company wants to use a custom conflict resolution policy for this container. What should you do?

   • AEnable multi-region writes and then change the conflict resolution policy on the container.
   • BUse the Azure CLI to set the conflict resolution policy at the account level.
   • CChange the conflict resolution policy on the container to the custom policy before enabling multi-region writes.
   • DCreate a new container with the custom conflict resolution policy and migrate the data.
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6. 25foundation · easy

   Where is the conflict resolution policy configured for an Azure Cosmos DB container?

   • AIn the database's settings under 'Consistency'.
   • BIn the client SDK's connection string.
   • CIn the container's settings during container creation or by updating the container.
   • DIn the account's settings under 'Multi-Region Writes'.
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