Design and Implement a Replication Strategy for Azure Cosmos DB DP-420 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A logistics company runs a tracking application on Azure Cosmos DB with a single write region and multiple read regions. The application requires that a read from any region always returns the most recent committed write. The team is concerned about the impact on read latency and RU consumption. Which consistency level should they select?

   • AStrong
   • BEventual
   • CSession
   • DBounded staleness
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2. 22foundation · easy

   You are developing an application that connects to a multi-region Azure Cosmos DB account. Which connection mode should you use to take advantage of the regional endpoints and automatically route requests to the nearest region?

   • AGateway mode
   • BVPN mode
   • CDirect mode
   • DProxy mode
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4. 23application · medium

   A company is deploying a new Cosmos DB account for a global application. The application will be rolled out in phases: first in North America, then in Europe, and finally in Asia. The company wants to minimize costs during the initial phase while ensuring that the application can serve users in each region as they are added. What should the company do?

   • AStart with a single write region and add read regions as each phase rolls out.
   • BCreate a separate Cosmos DB account for each region and replicate data manually.
   • CAdd all regions at account creation and enable automatic failover.
   • DUse a single region and rely on the application to redirect users to that region.
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5. 24expert · hard

   A social media company uses Azure Cosmos DB for user posts. The application is deployed in multiple regions and uses Session consistency. The team wants to ensure that a user's own posts are immediately visible after posting, while other users' posts can be slightly stale. They are considering changing to Eventual consistency to reduce RU costs. What should they do?

   • AChange to Eventual consistency and rely on the SDK to provide session guarantees.
   • BUse Bounded staleness with a short lag to balance cost and consistency.
   • CKeep Session consistency because it guarantees that a user's own writes are immediately visible to that user's session.
   • DChange to Strong consistency to ensure all users see posts immediately.
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6. 25application · medium

   A company has an Azure Cosmos DB account with write regions in East US and West Europe. The application is deployed in both regions and uses the SDK. The team wants to ensure that write requests from the West Europe application are always sent to the West Europe region, even if the East US region is the current write region. What should they configure in the application?

   • AUse a connection string that points to the West Europe endpoint.
   • BSet the application region to West Europe in the CosmosClient options.
   • CEnable automatic failover on the account.
   • DPerform a manual failover to make West Europe the write region.
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