Implement Solutions Across Services DP-420 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   How does Azure AI Search typically keep its index synchronized with changes in an Azure Cosmos DB container?

   • ABy using a scheduled job that runs every hour
   • BBy using the Azure Cosmos DB change feed to automatically update the index
   • CBy requiring manual re-indexing whenever data changes
   • DBy using Azure Functions to push every change to the search index
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2. 7application · medium

   A retail company stores product information in an Azure Cosmos DB container. Each product document contains a categoryId field. The company also maintains a separate categories container. A new requirement states that the product documents must include the category name for faster client-side lookups. You need to update the product documents automatically whenever a category name changes. The solution must use Azure Functions and minimize the amount of custom code. What should you implement?

   • AAn Azure Functions timer trigger that periodically scans all product documents and updates them based on the current category names.
   • BAn Azure Functions HTTP trigger that is called by the client application after every category update to manually update the product documents.
   • CA stored procedure in the categories container that updates all product documents in the same transaction.
   • DAn Azure Functions change feed processor that listens to the categories container and updates the corresponding product documents in the products container.
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4. 8foundation · easy

   When archiving data from Azure Cosmos DB using the change feed and Azure Functions, what is the purpose of writing the document to Azure Blob Storage?

   • ATo provide a low-cost storage tier for infrequently accessed data
   • BTo enable real-time analytics on the archived data
   • CTo improve the query performance of Cosmos DB by removing old data
   • DTo create a backup that can be restored in case of disaster
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5. 9expert · hard

   An e-commerce platform uses Azure Cosmos DB to store product and inventory data. The product container has a change feed processor that denormalizes the category name into product documents. The inventory container has a separate change feed processor that maintains a running total of available items per product. Recently, the change feed processor for the product container has been falling behind during peak traffic, causing stale category names. You need to improve the throughput of the change feed processing without changing the Cosmos DB throughput. What should you do?

   • AMove the change feed processor to a different Azure region.
   • BIncrease the number of instances of the Azure Function hosting the change feed processor.
   • CIncrease the lease collection's throughput in Cosmos DB.
   • DReduce the batch size of the change feed processor.
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6. 10foundation · easy

   When using the change feed to implement referential integrity, what action might an Azure Function perform when a parent document is deleted?

   • ADelete all related child documents
   • BUpdate the child documents to point to a new parent
   • CCreate a new parent document with the same ID
   • DRestore the parent document from a backup
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