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Microsoft AZ-204 Exam

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Question 71
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You develop a software as a service (SaaS) offering to manage photographs. Users upload photos to a web service which then stores the photos in Azure
Storage Blob storage. The storage account type is General-purpose V2.
When photos are uploaded, they must be processed to produce and save a mobile-friendly version of the image. The process to produce a mobile-friendly version of the image must start in less than one minute.
You need to design the process that starts the photo processing.
Solution: Use the Azure Blob Storage change feed to trigger photo processing.
Does the solution meet the goal?
A. Yes
B. No
The change feed is a log of changes that are organized into hourly segments but appended to and updated every few minutes. These segments are created only when there are blob change events that occur in that hour.
Instead catch the triggered event, so move the photo processing to an Azure Function triggered from the blob upload.
Reference:
https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-change-feed
https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-event-overview

Question 72
You are developing a web application that runs as an Azure Web App. The web application stores data in Azure SQL Database and stores files in an Azure
Storage account. The web application makes HTTP requests to external services as part of normal operations.
The web application is instrumented with Application Insights. The external services are OpenTelemetry compliant.
You need to ensure that the customer ID of the signed in user is associated with all operations throughout the overall system.
What should you do?
A. Add the customer ID for the signed in user to the CorrelationContext in the web application
B. On the current SpanContext, set the TraceId to the customer ID for the signed in user
C. Set the header Ocp-Apim-Trace to the customer ID for the signed in user
D. Create a new SpanContext with the TraceFlags value set to the customer ID for the signed in user
Reference:
https://docs.microsoft.com/en-us/azure/azure-monitor/app/correlation

Question 73
HOTSPOT -
You are developing an Azure Function App. You develop code by using a language that is not supported by the Azure Function App host. The code language supports HTTP primitives.
You must deploy the code to a production Azure Function App environment.
You need to configure the app for deployment.
Which configuration values should you use? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
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Box 1: Docker container -
A custom handler can be deployed to every Azure Functions hosting option. If your handler requires operating system or platform dependencies (such as a language runtime), you may need to use a custom container. You can create and deploy your code to Azure Functions as a custom Docker container.
Box 2: PowerShell core -
When creating a function app in Azure for custom handlers, we recommend you select .NET Core as the stack. A "Custom" stack for custom handlers will be added in the future.
PowerShell Core (PSC) is based on the new .NET Core runtime.
Box 3: 7.0 -
On Windows: The Azure Az PowerShell module is also supported for use with PowerShell 5.1 on Windows.
On Linux: PowerShell 7.0.6 LTS, PowerShell 7.1.3, or higher is the recommended version of PowerShell for use with the Azure Az PowerShell module on all platforms.
Reference:
https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-function-linux-custom-image https://docs.microsoft.com/en-us/powershell/azure/install-az-ps?view=azps-7.1.0

Question 74
DRAG DROP -
You provision virtual machines (VMs) as development environments.
One VM does not start. The VM is stuck in a Windows update process. You attach the OS disk for the affected VM to a recovery VM.
You need to correct the issue.
In which order should you perform the actions? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
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Remove the update that causes the problem
1. Take a snapshot of the OS disk of the affected VM as a backup.
2. Attach the OS disk to a recovery VM.
3. Once the OS disk is attached on the recovery VM, run diskmgmt.msc to open Disk Management, and ensure the attached disk is ONLINE.
4. (Step 1) Open an elevated command prompt instance (Run as administrator). Run the following command to get the list of the update packages that are on the attached OS disk: dism /image:<Attached OS disk>:\ /get-packages > c: emp\Patch_level
5. (Step 2) Open the C: emp\Patch_level.txt file, and then read it from the bottom up. Locate the update that's in Install Pending or Uninstall Pending state.
6. Remove the update that caused the problem:
dism /Image:<Attached OS disk>:\ /Remove-Package /PackageName:<PACK
7. (Step 4) Detach the OS disk and recreate the VM. Then check whether the issue is resolved.
Reference:
https://docs.microsoft.com/en-us/troubleshoot/azure/virtual-machines/troubleshoot-stuck-updating-boot-error

Question 75
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You develop an HTTP triggered Azure Function app to process Azure Storage blob data. The app is triggered using an output binding on the blob.
The app continues to time out after four minutes. The app must process the blob data.
You need to ensure the app does not time out and processes the blob data.
Solution: Update the functionTimeout property of the host.json project file to 10 minutes.
Does the solution meet the goal?
A. Yes
B. No
Instead pass the HTTP trigger payload into an Azure Service Bus queue to be processed by a queue trigger function and return an immediate HTTP success response.
Note: Large, long-running functions can cause unexpected timeout issues. General best practices include:
Whenever possible, refactor large functions into smaller function sets that work together and return responses fast. For example, a webhook or HTTP trigger function might require an acknowledgment response within a certain time limit; it's common for webhooks to require an immediate response. You can pass the
HTTP trigger payload into a queue to be processed by a queue trigger function. This approach lets you defer the actual work and return an immediate response.
Reference:
https://docs.microsoft.com/en-us/azure/azure-functions/functions-best-practices


Question 76
HOTSPOT -
You are developing an Azure Durable Function based application that processes a list of input values. The application is monitored using a console application that retrieves JSON data from an Azure Function diagnostic endpoint.
During processing a single instance of invalid input does not cause the function to fail. Invalid input must be available to the monitoring application.
You need to implement the Azure Durable Function and the monitoring console application.
How should you complete the code segments? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
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Box 1: await context.CallEntityAsync(input[errindex],"error")
Orchestration signals and calls an entity
Orchestrator functions can access entities by using APIs on the orchestration trigger binding.
Example:
[FunctionName("CounterOrchestration")]
public static async Task Run(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
var entityId = new EntityId(nameof(Counter), "myCounter");
// Two-way call to the entity which returns a value - awaits the response int currentValue = await context.CallEntityAsync<int>(entityId, "Get");
Box 2: Failed -
During processing a single instance of invalid input does not cause the function to fail.
Note: RuntimeStatus: One of the following values:
Failed: The instance failed with an error.
Completed: The instance has completed normally.
Terminated: The instance was stopped abruptly.
Pending: The instance has been scheduled but has not yet started running.
Running: The instance has started running.
ContinuedAsNew: The instance has restarted itself with a new history. This state is a transient state.
Box 3: Input -
Invalid input must be available to the monitoring application.
Reference:
https://docs.microsoft.com/en-us/azure/azure-functions/durable/durable-functions-entities
https://docs.microsoft.com/en-us/azure/azure-functions/durable/durable-functions-instance-management

Question 77
You are developing an Azure Durable Function to manage an online ordering process.
The process must call an external API to gather product discount information.
You need to implement the Azure Durable Function.
Which Azure Durable Function types should you use? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
A. Orchestrator
B. Entity
C. Client
D. Activity
The Durable Functions extension exposes a set of built-in HTTP APIs that can be used to perform management tasks on orchestrations, entities, and task hubs.
These HTTP APIs are extensibility webhooks that are authorized by the Azure Functions host but handled directly by the Durable Functions extension.
Reference:
https://docs.microsoft.com/en-us/azure/azure-functions/durable/durable-functions-http-api

Question 78
You develop Azure Durable Functions to manage vehicle loans.
The loan process includes multiple actions that must be run in a specified order. One of the actions includes a customer credit check process, which may require multiple days to process.
You need to implement Azure Durable Functions for the loan process.
Which Azure Durable Functions type should you use?
A. orchestrator
B. client
C. entity
D. activity

Question 79
HOTSPOT
-
You are developing an Azure Function app.
All functions in the app meet the following requirements:
• Run until either a successful run or until 10 run attempts occur.
• Ensure that there are at least 20 seconds between attempts for up to 15 minutes.
You need to configure the host.json file.
How should you complete the code segment? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
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Question 80
You develop Azure Web Apps for a commercial diving company. Regulations require that all divers fill out a health questionnaire every 15 days after each diving job starts.
You need to configure the Azure Web Apps so that the instance count scales up when divers are filling out the questionnaire and scales down after they are complete.
You need to configure autoscaling.
What are two possible auto scaling configurations to achieve this goal? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.
A. Recurrence profile
B. CPU usage-based autoscaling
C. Fixed date profile
D. Predictive autoscaling