Microsoft Certified: Azure Developer Associate Azure Cosmos DB Development 3

Question 1

Which Azure Cosmos DB conflict resolution policy automatically picks the write with the highest value of a user-defined property?

Accepted Answer

Last-Write-Wins (LWW)

Answer

Last-Write-Wins (LWW) uses a user-defined integer property (_ts by default) to resolve conflicts, keeping the write with the highest value.

Question 2

How does Autoscale throughput in Azure Cosmos DB differ from standard (manual) provisioned throughput?

Accepted Answer

Autoscale automatically scales RU/s between 10% and 100% of the maximum you set based on demand

Answer

With Autoscale, Cosmos DB automatically adjusts throughput between 10% of the configured max RU/s and the full max, so you only pay for what you use.

Question 3

Which Azure service can be used to process Cosmos DB change feed events in a serverless, event-driven manner?

Accepted Answer

Azure Functions with Cosmos DB trigger

Answer

Azure Functions has a native Cosmos DB trigger that listens to the change feed and invokes the function whenever items are inserted or updated.

Question 4

What does the Azure Cosmos DB emulator provide for developers?

Accepted Answer

A local environment that emulates the Cosmos DB service for development and testing without Azure costs

Answer

The Azure Cosmos DB emulator runs locally on Windows and emulates the Cosmos DB service so developers can build and test without connecting to Azure or incurring costs.

Question 5

When using Azure Cosmos DB with multi-region writes enabled, which consistency levels are supported?

Accepted Answer

All levels except Strong and Bounded Staleness

Answer

With multi-region writes, Strong consistency and Bounded Staleness are not supported because they require single-master coordination; the other three levels (Session, Consistent Prefix, Eventual) are available.

Microsoft Certified: Azure Developer Associate Practice Test

Microsoft Certified: Azure Developer Associate Practice Test

Microsoft Certified: Azure Developer Associate Azure Cosmos DB Development 3