Microsoft AZ-204 Online Practice Questions and Exam Preparation

Microsoft AZ-204 Online Questions & Answers

• Question 211:

  HOTSPOT

  A company is developing a gaming platform. Users can join teams to play online and see leaderboards that include player statistics. The solution includes an entity named Team.

  You plan to implement an Azure Redis Cache instance to improve the efficiency of data operations for entities that rarely change.

  You need to invalidate the cache when team data is changed.

  How should you complete the code? To answer, select the appropriate options in the answer area;

  NOTE: Each correct selection is worth one point.

  

  

  ---

  Box 1: IDatabase cache = connection.GetDatabase(); Connection refers to a previously configured ConnectionMultiplexer.

  Box 2: cache.StringSet("teams",")

  To specify the expiration of an item in the cache, use the TimeSpan parameter of StringSet.

  cache.StringSet("key1", "value1", TimeSpan.FromMinutes(90)); References:

  https://azure.microsoft.com/sv-se/blog/lap-around-azure-redis-cache-preview/

• Question 212:

  You develop a solution that uses Azure Virtual Machines (VMs).

  The VMs contain code that must access resources in an Azure resource group. You grant the VM access to the resource group in Resource Manager.

  You need to obtain an access token that uses the VM's system-assigned managed identity.

  Which two actions should you perform? Each correct answer presents part of the solution.

  A. From the code on the VM, call Azure Resource Manager using an access token.
  B. Use PowerShell on a remote machine to make a request to the local managed identity for Azure resources endpoint.
  C. Use PowerShell on the VM to make a request to the local managed identity for Azure resources endpoint.
  D. From the code on the VM, call Azure Resource Manager using a SAS token.
  E. From the code on the VM, generate a user delegation SAS token.
  B. Use PowerShell on a remote machine to make a request to the local managed identity for Azure resources endpoint.
  D. From the code on the VM, call Azure Resource Manager using a SAS token.

• Question 213:

  DRAG DROP

  You are developing a software solution for an autonomous transportation system. The solution uses large data sets and Azure Batch processing to simulate navigation sets for entire fleets of vehicles.

  You need to create compute nodes for the solution on Azure Batch.

  What should you do?

  Put the actions in the correct order.

  Select and Place:

  

  

• Question 214:

  A company is developing a solution that allows smart refrigerators to send temperature information to a central location. You have an existing Service Bus.

  The solution must receive and store messages until they can be processed. You create an Azure Service Bus instance by providing a name, pricing tier, subscription, resource group, and location.

  You need to complete the configuration.

  Which Azure CLI or PowerShell command should you run?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  A. Option A

  ---

  Explanation

  A service bus instance has already been created (Step 2 below). Next is step 3, Create a Service Bus queue.

  Note:

  Steps:

  Step 1: # Create a resource group resourceGroupName="myResourceGroup" az group create --name $resourceGroupName --location eastus

  Step 2: # Create a Service Bus messaging namespace with a unique name namespaceName=myNameSpace$RANDOM az servicebus namespace create --resource-group $resourceGroupName --name $namespaceName --location eastus

  Step 3: # Create a Service Bus queue az servicebus queue create --resource-group $resourceGroupName --namespace-name $namespaceName --name BasicQueue

  Step 4: # Get the connection string for the namespace connectionString=$(az servicebus namespace authorization-rule keys list --resource-group $resourceGroupName --namespace-name $namespaceName --name RootManageSharedAccessKey --query primaryConnectionString --output tsv)

  https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-quickstart-cli

• Question 215:

  HOTSPOT

  You develop a Python application for image rendering. The application uses GPU resources to optimize rendering processes.

  You have the following requirements:

  The application must be deployed to a Linux container.

  The container must be stopped when the image rendering is complete.

  The solution must minimize cost.

  You need to deploy the application to Azure.

  

  

  ---

  Box 1: Azure Kubernetes Service Compute target

  Use GPUs for compute-intensive workloads on Azure Kubernetes Service (AKS)

  Graphical processing units (GPUs) are often used for compute-intensive workloads, such as graphics and visualization workloads. AKS supports GPU-enabled Linux node pools to run compute-intensive Kubernetes workloads.

  Incorrect:

  * Azure Container Instances

  Deploy container instances that use GPU resources

  To run certain compute-intensive workloads on Azure Container Instances, deploy your container groups with GPU resources. The container instances in the group can access one or more NVIDIA Tesla GPUs while running container workloads such as CUDA and deep learning applications.

  Important

  K80 and P100 GPU SKUs are retiring by August 31st, 2023. This is due to the retirement of the underlying VMs used: NC Series and NCv2 Series Although V100 SKUs will be available, it is recommended to use Azure Kubernetes Service instead. GPU resources are not fully supported and should not be used for production workloads. Use the following resources to migrate to AKS today

  Box 2: Restart Policy

  Container termination

  Set the Restart Policy to Never.

  Kubernetes Pod Restart Policy

  In Kubernetes, the lifecycle of a Pod progresses through several stages, starting from "pending" when it is being scheduled and transitioning to "running" once the main containers are successfully started. Depending on the success or failure of the containers, the Pod moves to the "succeeded" or "failed" state.

  The kubelet, the Kubernetes node agent, has the ability to automatically restart each container within a running Pod to address specific issues. Kubernetes continuously monitors the status of containers within Pods and takes appropriate actions to restore the node's health.

  However, a Pod cannot heal itself in certain situations, such as when the node hosting it fails or during node maintenance or evictions due to resource constraints. In these cases, Kubernetes may remove the Pod.

  To control the restart behavior of containers within a Pod, the restartPolicy property is used in the Pod specification. There are three possible settings for this policy:

  Always: The default setting. The Pod should always remain active, so whenever a container terminates, Kubernetes starts a new one automatically.

  OnFailure: The container is only restarted if it exits with a non-zero return value, indicating a failure. Successful exits with a return value of 0 do not trigger a restart.

  *-> Never: The container is never restarted automatically, even if it terminates.

  https://learn.microsoft.com/en-us/azure/aks/gpu-cluster

  https://learn.microsoft.com/en-us/azure/container-instances/container-instances-gpu

  https://www.atatus.com/blog/restart-kubernetes-pods-with-kubectl

• Question 216:

  You develop an app that allows users to upload photos and videos to Azure storage. The app uses a storage REST API call to upload the media to a blob storage account named Account1. You have blob storage containers named

  Container1 and Container2.

  Uploading of videos occurs on an irregular basis.

  You need to copy specific blobs from Container1 to Container2 in real time when specific requirements are met, excluding backup blob copies.

  What should you do?

  A. Download the blob to a virtual machine and then upload the blob to Container2.
  B. Run the Azure PowerShell command Start-AzureStorageBlobCopy.
  C. Copy blobs to Container2 by using the Put Blob operation of the Blob Service REST API.
  D. Use AzCopy with the Snapshot switch blobs to Container2.
  B. Run the Azure PowerShell command Start-AzureStorageBlobCopy.

  ---

  Explanation

  The Start-AzureStorageBlobCopy cmdlet starts to copy a blob.

  Example 1: Copy a named blob

  C:\PS>Start-AzureStorageBlobCopy -SrcBlob "ContosoPlanning2015" -DestContainer "ContosoArchives" -SrcContainer "ContosoUploads"

  This command starts the copy operation of the blob named ContosoPlanning2015 from the container named ContosoUploads to the container named ContosoArchives.

  References:

  https://docs.microsoft.com/en-us/powershell/module/azure.storage/start-azurestorageblobcopy?view=azurermps-6.13.0

• Question 217:

  You develop an ASP.NET Core app that uses Azure App Configuration. You also create an App Configuration containing 100 settings.

  The app must meet the following requirements:

  1. Ensure the consistency of all configuration data when changes to individual settings occur.

  2. Handle configuration data changes dynamically without causing the application to restart.

  3. Reduce the overall number of requests made to App Configuration APIs.

  You must implement dynamic configuration updates in the app.

  What are two ways to achieve this goal? Each correct answer presents part of the solution.

  NOTE: Each correct selection is worth one point.

  A. Increase the App Configuration cache expiration from the default value.
  B. Create and implement environment variables for each App Configuration store setting.
  C. Decrease the App Configuration cache expiration from the default value.
  D. Register all keys in the App Configuration store. Set the refreshAII parameter of the Register method to false.
  E. Create and register a sentinel key in the App Configuration store. Set the refreshAII parameter of the Register method to true.
  F. Create and configure Azure Key Vault. Implement the Azure Key Vault configuration provider.
  A. Increase the App Configuration cache expiration from the default value.
  E. Create and register a sentinel key in the App Configuration store. Set the refreshAII parameter of the Register method to true.

  ---

  Explanation

  Quotes from the reference below: "A sentinel key is a key that you update after you complete the change of all other keys. Your app monitors the sentinel key. When a change is detected, your app refreshes all configuration values. This approach helps to ensure the consistency of configuration in your app and reduces the overall number of requests made to your App Configuration store, compared to monitoring all keys for changes."

  "You can add a call to the refreshOptions.SetCacheExpiration method to specify the minimum time between configuration refreshes. In this example, you use the default value of 30 seconds. Adjust to a higher value if you need to reduce the number of requests made to your App Configuration store."

  https://learn.microsoft.com/en-us/azure/azure-app-configuration/enable-dynamic-configuration-aspnet-core?tabs=core6x

• Question 218:

  HOTSPOT

  You are building a software-as-a-service (SaaS) application that analyzes DNA data that will run on Azure virtual machines (VMs) in an availability zone. The data is stored on managed disks attached to the VM. The performance of the analysis is determined by the speed of the disk attached to the VM.

  You have the following requirements:

  1. The application must be able to quickly revert to the previous day's data if a systemic error is detected.

  2. The application must minimize downtime in the case of an Azure datacenter outage.

  You need to provision the managed disk for the VM to maximize performance while meeting the requirements.

  Which type of Azure Managed Disk should you use? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  

  

  ---

  Box 1: Premium SSD

  Use Premium SSD for production and performance sensitive workloads.

  Incorrect:

  Use Standard SSD for web servers, lightly used enterprise applications and dev/test.

  Use Standard HDD for backup, non-critical, infrequent access.

  Box 2: Geo-redundant storage (GRS)

  Recovery by using geo-redundant storage of blob, table, queue, and VM disk storage

  In Azure, blobs, tables, queues, and VM disks are all geo-replicated by default. This is referred to as geo-redundant storage (GRS). GRS replicates storage data to a paired datacenter located hundreds of miles apart within a specific geographic region. GRS is designed to provide additional durability in case there is a major datacenter disaster.

  https://learn.microsoft.com/en-us/azure/virtual-machines/disks-types

  https://learn.microsoft.com/en-us/azure/architecture/resiliency/recovery-loss-azure-region

• Question 219:

  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 Azure solutions.

  You must grant a virtual machine (VM) access to specific resource groups in Azure Resource Manager.

  You need to obtain an Azure Resource Manager access token.

  Solution: Use an X.509 certificate to authenticate the VM with Azure Resource Manager.

  Does the solution meet the goal?

  A. Yes
  B. No
  B. No

  ---

  Explanation

  Instead run the Invoke-RestMethod cmdlet to make a request to the local managed identity for Azure resources endpoint.

  https://docs.microsoft.com/en-us/azure/active-directory/managed-identities-azure-resources/tutorial-windows-vm-access-arm

• Question 220:

  HOTSPOT

  You are developing a solution that uses several Azure Service Bus queues. You create an Azure Event Grid subscription for the Azure Service Bus namespace. You use Azure Functions as subscribers to process the messages.

  You need to emit events to Azure Event Grid from the queues. You must use the principal of least privilege and minimize costs.

  Which Azure Service Bus values should you use? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  

  

  ---

  Box 1: Premium

  Azure Service Bus to Event Grid integration To enable the feature, you need the following items:

  * A Service Bus Premium namespace with at least one Service Bus queue or a Service Bus topic with at least one subscription.

  * Contributor access to the Service Bus namespace. Navigate to your Service Bus namespace in the Azure portal, and then select Access control (IAM), and select Role assignments tab. Verify that you have the contributor access to the namespace.

  * Etc.

  Box 2: Contributor

  Note: Service Bus can emit events to Event Grid when there are messages in a queue or a subscription when no receivers are present. You can create Event Grid subscriptions to your Service Bus namespaces, listen to these events, and then react to the events by starting a receiver. With this feature, you can use Service Bus in reactive programming models. The key scenario of this feature is that Service Bus queues or subscriptions with a low volume of messages do not need to have a receiver that polls for messages continuously.

  https://learn.microsoft.com/en-us/azure/service-bus-messaging/service-bus-to-event-grid-integration-concept?tabs=event-grid-event-schema