AZ-204 Technology & Digital Applications 3

Question 1

You need to deploy an Azure Web App and ensure zero-downtime deployments. Which App Service feature should you use?

Accepted Answer

Deployment slots with slot swap

Answer

Deployment slots let you deploy to a staging slot, warm it up, then perform an atomic swap to production — eliminating downtime during the transition.

Question 2

An application reads messages from an Azure Service Bus queue. Sometimes the same message is processed twice. Which Service Bus feature should you enable to prevent duplicate processing?

Accepted Answer

Duplicate detection

Answer

Service Bus duplicate detection uses a MessageId-based history window to discard messages that were already received within a configurable time period.

Question 3

You need to secure communication between your Azure App Service and an Azure SQL Database so that neither traverses the public internet. What should you configure?

Accepted Answer

Deploy the App Service into a VNet and use a Private Endpoint for the SQL Database

Answer

VNet integration for App Service combined with a Private Endpoint for SQL Database routes all traffic over Azure's private network backbone, never touching the public internet.

Question 4

A Cosmos DB container uses 'userId' as its partition key. A query needs to retrieve all orders across ALL users. What is a concern with this design?

Accepted Answer

The query will execute as a cross-partition fan-out, consuming more RUs and increasing latency

Answer

Cross-partition queries fan out to every partition, multiplying RU consumption and increasing latency — this is expected behavior but must be accounted for in capacity planning.

Question 5

You are implementing retry logic for calls to Azure Blob Storage in a .NET application. Which library provides built-in retry policies including exponential backoff?

Accepted Answer

Azure.Storage.Blobs SDK (built-in retry pipeline)

Answer

The Azure.Storage.Blobs SDK v12+ includes a configurable retry pipeline with exponential backoff and jitter built in, requiring no external library.

AZ-204 - Microsoft Azure Developer Associate Practice Test

AZ-204 - Microsoft Azure Developer Associate Practice Test

AZ-204 Technology & Digital Applications 3