Implement Data Access by Using Azure Cosmos DB for NoSQL SDKs DP-420 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which property on an item is used to specify its Time-to-Live (TTL) value?

   • AtimeToLive
   • Bttl
   • CexpirationTime
   • DexpiresAt
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2. 2foundation · easy

   Which property in the query response contains the number of request units (RUs) consumed by a query?

   • AETag
   • BRequestCharge
   • CActivityId
   • DSessionToken
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4. 3foundation · easy

   In the Azure Cosmos DB .NET SDK, how do you pass a session token from a response to a subsequent request?

   • AStore the session token in a static variable and the SDK automatically uses it.
   • BUse the SessionToken property of the CosmosClient class.
   • CAdd the session token to the query string of the request.
   • DSet the SessionToken property in the RequestOptions of the subsequent request.
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5. 4application · medium

   A retail app stores customer profiles in Azure Cosmos DB for NoSQL. A support agent updates a customer's phone number. The app reads the item, changes the phoneNumber property, and calls ReplaceItemAsync. Another agent updates the same customer's address concurrently. The phone update succeeds, but the address update is lost. What should the developer do to prevent lost updates?

   • AUse a query with a WHERE clause to filter the item before updating.
   • BUse a stored procedure to perform the update transactionally.
   • CUse a patch operation to update only the phoneNumber property.
   • DUse optimistic concurrency by passing the item's ETag in the IfMatch option of ReplaceItemAsync.
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6. 5application · medium

   A reporting app queries a large Azure Cosmos DB for NoSQL container and returns thousands of items. The app currently loads all results into memory, which causes performance issues. The developer wants to process results in pages of 100 items and allow the user to navigate to the next page. What should the developer implement?

   • AUse a query with OFFSET and LIMIT clauses.
   • BUse FeedIterator with MaxItemCount set to 100 and pass the continuation token to the next request.
   • CUse ToListAsync() and then page the list in memory.
   • DUse a stored procedure to return 100 items at a time.
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