Implement Data Access by Using Azure Cosmos DB for NoSQL SDKs DP-420 Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   What is the primary benefit of using a patch operation in Azure Cosmos DB for NoSQL?

   • AIt automatically retries the operation if the item is being updated by another client.
   • BIt bypasses the need to specify a partition key for the item.
   • CIt allows you to update multiple items in a single atomic transaction.
   • DIt updates only the specified properties of an item without replacing the entire item.
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2. 32foundation · easy

   Which SDK feature is specifically designed for high-throughput data ingestion scenarios, such as migrating large amounts of data into Azure Cosmos DB?

   • ATransactional Batch
   • BChange Feed
   • CContinuation Tokens
   • DBulk Support
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4. 33foundation · easy

   What is the purpose of Time-to-Live (TTL) in Azure Cosmos DB?

   • ATo set the consistency level for a specific item.
   • BTo specify how long a session token remains valid.
   • CTo limit the amount of time a query can run before timing out.
   • DTo automatically delete items after a specified time period.
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5. 34application · medium

   A retail company needs to import 2 million product records into Azure Cosmos DB for NoSQL from a CSV file. The import must complete as quickly as possible and minimize the number of SDK calls. The application runs on an Azure VM with sufficient CPU and memory. Which approach should the team use?

   • AUse the Bulk SDK to submit all create operations in a single bulk operation.
   • BUse a stored procedure to insert all records in one execution.
   • CUse a for loop that calls CreateItemAsync for each record sequentially.
   • DUse a transactional batch for every 100 records.
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6. 35application · medium

   An IoT solution stores device telemetry in Azure Cosmos DB for NoSQL. Each device document has a large readings array. A function app needs to add a new reading to the array and update the lastUpdated timestamp without replacing the entire document. The function app must minimize request units (RUs) and avoid overwriting concurrent changes. What should the developer implement?

   • AUse a patch operation with add and set operations, and include the ETag in the condition.
   • BUse a query to fetch the document, modify the array in memory, and call UpsertItemAsync.
   • CUse a stored procedure to read, modify, and replace the document.
   • DUse ReplaceItemAsync with the full updated document and the ETag in IfMatch.
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