Implement Data Access by Using Azure Cosmos DB for NoSQL SDKs DP-420 Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   In Azure Cosmos DB for NoSQL, what is the primary difference between a point operation and a query operation?

   • APoint operations can only be used to create items, while query operations are used for all reads and updates.
   • BPoint operations read or write a single item by its ID and partition key, while query operations use SQL to filter across items.
   • CPoint operations are always faster than query operations because they do not consume request units.
   • DPoint operations require a SQL query to specify the item, while query operations use the item ID directly.
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2. 27foundation · easy

   Which SDK class is used to define a set of patch operations in the Azure Cosmos DB .NET SDK?

   • APatchOperation
   • BPatchItemRequestOptions
   • CItemPatchBuilder
   • DPatchDefinition
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4. 28foundation · easy

   How can you override the default consistency level for a specific query in Azure Cosmos DB for NoSQL?

   • AChange the consistency level in the Azure portal for the database account.
   • BUse a different client instance with a different consistency level.
   • CSet the ConsistencyLevel property in the QueryRequestOptions for that query.
   • DInclude a special header in the query string to override consistency.
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5. 29expert · hard

   A developer is using the Azure Cosmos DB .NET SDK's bulk support to insert 1 million items. The container has 10,000 RU/s. The developer notices that the bulk operation takes longer than expected and some requests are getting 429s. The developer wants to improve the throughput of the bulk operation without changing the container's RU/s. What should the developer do?

   • ADistribute the items across multiple logical partitions to avoid hot partitions.
   • BEnable the SDK's automatic retry for 429s and ensure the RetryAfter is respected.
   • CUse a smaller batch size for the bulk operation.
   • DIncrease the degree of parallelism in the bulk operation.
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6. 30expert · hard

   A multi-region Azure Cosmos DB account is configured with session consistency. A web application runs in two regions and uses the same account. A user makes a write in region A, then immediately makes a read that is routed to region B. The team wants to ensure the user sees their own write. What should they do?

   • APass the session token from the write to the read request, and ensure the read is routed to a replica that has the write.
   • BChange the account consistency to Strong to guarantee cross-region read-your-writes.
   • CUse a continuation token from the write to ensure the read sees the latest data.
   • DUse a point read with the ETag from the write to force the read to the primary replica.
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