Implement Data Access by Using Azure Cosmos DB for NoSQL SDKs DP-420 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A web app uses Azure Cosmos DB for NoSQL with Session consistency. After a user writes an item, subsequent reads from the same user's session must see that write. The app uses multiple instances behind a load balancer. The developer notices that sometimes a read from a different instance does not see the write. What should the developer do to ensure session consistency across instances?

   • AUse a change feed to replicate writes to all instances.
   • BUse a single instance for all reads and writes.
   • CCapture the session token from the write response and include it in the request options for subsequent reads.
   • DUse Strong consistency for all reads.
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2. 12expert · hard

   A data migration tool needs to load 10 million historical orders into Azure Cosmos DB for NoSQL. The orders have a natural partition key of customerId. The team wants to maximize throughput while staying within the provisioned RUs. They are considering using the Bulk SDK. What is the best way to handle 429 responses during the bulk operation?

   • AIncrease the provisioned RUs to the maximum to avoid 429 responses entirely.
   • BLet the Bulk SDK handle retries automatically and monitor the operation's progress for any failures that exceed the retry policy.
   • CUse a transactional batch for every 100 orders to ensure atomicity and reduce 429 errors.
   • DDisable retries in the Bulk SDK and manually retry failed operations to have full control.
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4. 13foundation · easy

   In Azure Cosmos DB for NoSQL, what is the role of the ETag in optimistic concurrency control?

   • AIt is a unique identifier for the item that is used to route requests to the correct partition.
   • BIt is a timestamp that indicates when the item was last read.
   • CIt is a security token that authorizes access to the item.
   • DIt is a version identifier that is checked before an update to ensure the item has not changed.
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5. 14foundation · easy

   In the Azure Cosmos DB .NET SDK, how do you obtain the continuation token from a query response?

   • AAccess the NextToken property of the QueryDefinition object.
   • BAccess the SessionToken property of the response.
   • CAccess the ContinuationToken property of the FeedResponse object.
   • DAccess the ETag property of the response.
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6. 15foundation · easy

   What is the primary benefit of using Bulk Support in the Azure Cosmos DB for NoSQL SDK?

   • AIt automatically partitions data across physical partitions to optimize performance.
   • BIt allows operations to target items across different containers in a single call.
   • CIt guarantees atomic execution of all operations in the bulk set.
   • DIt reduces the number of network round trips by batching operations and managing concurrency automatically.
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