Microsoft AZ-204 Online Practice Questions and Exam Preparation

Microsoft AZ-204 Online Questions & Answers

• Question 441:

  HOTSPOT

  You have an app that stores player scores for an online game. The app stores data in Azure tables using a class named PlayerScore as the table entity. The table is populated with 100,000 records.

  You are reviewing the following section of code that is intended to retrieve 20 records where the player score exceeds 15,000. (Line numbers are included for reference only.)

  

  You have the following code. (Line numbers are included for reference only.)

  

  You store customer information in an Azure Cosmos database. The following data already exists in the database:

  

  You develop the following code. (Line numbers are included for reference only.)

  01 CloudTableClient tableClient = account.CreateCloudTableClient();

  02 CloudTable table = tableClient.GetTableReference("people");

  03 TableQuery<CustomerEntity> query = new TableQuery<CustomerEntity>()

  04 .Where(TableQuery.CombineFilters(

  05 TableQuery.GenerateFilterCondition(Email, QueryComparisons.Equal, "Smith"),

  06 TableOperators.And, TableQuery.GenerateFilterCondition(Email, QueryComparisons.Equal,

  07 "[email protected]")

  08 ));

  09 await table.ExecuteQuerySegmentedAsync<CustomerEntity>(query, null);

  For each of the following statements, select Yes if the statement is true. Otherwise, select No.

  NOTE: Each correct selection is worth one point.

  

  

• Question 442:

  You develop and deploy an Azure App Service web app. The app is deployed to multiple regions and uses Azure Traffic Manager. Application Insights is enabled for the app.

  You need to analyse app uptime for each month.

  Which two solutions will achieve the goal? Each correct answer presents part of the solution.

  NOTE: Each correct selection is worth one point.

  A. Azure Monitor logs
  B. Application Insights alerts
  C. Azure Monitor metrics
  D. Application Insights web tests
  A. Azure Monitor logs
  B. Application Insights alerts

  ---

  Explanation

  https://azure.microsoft.com/en-us/blog/creating-a-web-test-alert-programmatically-with-application-insights/

• Question 443:

  HOTSPOT

  You implement an Azure solution to include Azure Cosmos DB, the latest Azure Cosmos DB SDK, and the Core (SQL) API. You also implement a change feed processor on a new container instance by using the Azure Functions trigger for Azure Cosmos DB.

  A large batch of documents continues to fail when reading one of the documents in the batch. The same batch of documents is continuously retried by the triggered function and a new batch of documents must be read.

  You need to implement the change feed processor to read the documents.

  Which feature should you implement? To answer, select the appropriate features in the answer area.

  NOTE: Each correct selection is worth one point.

  

  

  ---

  Box 1: Change feed estimator

  Box 2: Dead-letter queue

  The change feed processor library guarantees an "at-least-once" delivery of all of the changes. In other words, if you use the change feed processor library, your processing function will be called successfully for every item in the change feed.

  If there is an unhandled exception in the business logic in your processing function, the failed changes will be retried until they are processed successfully. To prevent your change feed processor from getting "stuck" continuously retrying the same changes, add logic in your processing function to write documents, upon exception, to a dead-letter queue.

  In Azure Functions, the recommendation for handling errors is the same. You should still add logic in your delegate code to write documents, upon exception, to a dead-letter queue.

  Incorrect:

  * Lease container

  The lease container acts as a state storage and coordinates processing the change feed across multiple workers. The lease container can be stored in the same account as the monitored container or in a separate account.

  * Life-cycle notifications

  The change feed processor lets you hook to relevant events in its life cycle, you can choose to be notified to one or all of them. The recommendation is to at least register the error notification:

  Register a handler for WithLeaseAcquireNotification to be notified when the current host acquires a lease to start processing it.

  Register a handler for WithLeaseReleaseNotification to be notified when the current host releases a lease and stops processing it.

  Register a handler for WithErrorNotification to be notified when the current host encounters an exception during processing, being able to distinguish if the source is the user delegate (unhandled exception) or an error the processor is encountering trying to access the monitored container (for example, networking issues).

  https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/change-feed-processor

  https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/read-change-feed

• Question 444:

  Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.

  You are developing and deploying several ASP.Net web applications to Azure App Service. You plan to save session state information and HTML output. You must use a storage mechanism with the following requirements:

  1. Share session state across all ASP.NET web applications

  2. Support controlled, concurrent access to the same session state data for multiple readers and a single writer

  3. Save full HTTP responses for concurrent requests

  You need to store the information.

  Proposed Solution: Enable Application Request Routing (ARR)

  Does the solution meet the goal?

  A. Yes
  B. No
  B. No

  ---

  Explanation

  Instead deploy and configure Azure Cache for Redis. Update the web applications.

  https://docs.microsoft.com/en-us/azure/architecture/best-practices/caching#managing-concurrency-in-a-cache

• Question 445:

  DRAG DROP

  You plan to create a Docker image that runs an ASP.NET Core application named ContosoApp. You have a setup script named setupScript.ps1 and a series of application files including ContosoApp.dll.

  You need to create a Dockerfile document that meets the following requirements:

  1. Call setupScripts.ps1 when the container is built.

  2. Run ContosoApp.dll when the container starts.

  The Dockerfile document must be created in the same folder where ContosoApp.dll and setupScript.ps1 are stored.

  Which five commands should you use to develop the solution? To answer, move the appropriate commands from the list of commands to the answer area and arrange them in the correct order.

  Select and Place:

  

  

  ---

  Box 1: CMD [..]

  Cmd starts a new instance of the command interpreter, Cmd.exe.

  Syntax: CMD <string>

  Specifies the command you want to carry out.

  Box 2: FROM microsoft/aspnetcore-build:latest

  Box 3: WORKDIR /apps/ContosoApp

  Bxo 4: COPY ./ .

  Box 5: RUN powershell ./setupScript.ps1

• Question 446:

  You have a Linux container-based console application that uploads image files from customer sites all over the world. A back-end system that runs on Azure virtual machines processes the images by using the Azure Blobs API.

  You are not permitted to make changes to the application.

  Some customer sites only have phone-based internet connections.

  You need to configure the console application to access the images.

  What should you use?

  A. Azure BlobFuse
  B. Azure Disks
  C. Azure Storage Network File System (NFS) 3.0 support
  D. Azure Files
  C. Azure Storage Network File System (NFS) 3.0 support

  ---

  Explanation

  Mount Blob Storage by using the Network File System (NFS) 3.0 protocol

  You can mount a container in Azure Blob Storage from a Linux-based Azure virtual machine (VM) or a Linux system that runs on-premises by using the Network File System (NFS) 3.0 protocol.

  The NFS 3.0 protocol is supported for standard general-purpose v2 storage accounts and for premium block blob storage accounts.

  Incorrect:

  * Azure BlobFuse

  BlobFuse is a virtual file system driver for Azure Blob Storage. Use BlobFuse to access your existing Azure block blob data through the Linux file system.

  * Azure Files

  Azure Files provides a similar workflow to that of BlobFuse and is available on both Windows and Linux.

  * Azure Disk Storage

  Not suitable for storing unstructured data; mainly used for hosting VM disks and persistent storage for Kubernetes.

  Uses the NTFS file system, which is the same file system used by Windows.

  https://learn.microsoft.com/en-us/azure/storage/blobs/network-file-system-protocol-support-how-to

  https://learn.microsoft.com/en-us/azure/storage/blobs/blobfuse2-what-is

• Question 447:

  HOTSPOT

  You are building an application that stores sensitive customer data in Azure Blob storage. The data must be encrypted with a key that is unique for each customer.

  If the encryption key has been corrupted it must not be used for encryption.

  You need to ensure that the blob is encrypted.

  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.

  

  

• Question 448:

  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 on the review screen.

  You have an Azure App Service web app named WebApp1 and an Azure Functions app named Function 1. WebApp1 is associated with an Application Insights instance named appinsights1.

  You configure a web test and a corresponding alert for WebApp1 in appinsights1. Each alert triggers a delivery of email to your mailbox.

  You need to ensure that each alert also triggers execution of Function1.

  Solution: Configure an Application Insights funnel.

  Does the solution meet the goal?

  A. Yes
  B. No
  A. Yes

  ---

  
  

• Question 449:

  DRAG DROP

  You have an application that uses Azure Blob storage.

  You need to update the metadata of the blobs.

  Which three methods should you use to develop the solution? To answer, move the appropriate methods from the list of methods to the answer area and arrange them in the correct order.

  Select and Place:

  

  

  ---

  Metadata.Add example:

  // Add metadata to the dictionary by calling the Add method

  metadata.Add("docType", "textDocuments");

  SetMetadataAsync example:

  // Set the blob's metadata.

  await blob.SetMetadataAsync(metadata);

  // Set the blob's properties.

  await blob.SetPropertiesAsync(); Reference:

  https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-properties-metadata

• Question 450:

  You need to migrate on-premises shipping data to Azure.

  What should you use?

  A. Azure Migrate
  B. Azure Cosmos DB Data Migration tool (dt.exe)
  C. AzCopy
  D. Azure Database Migration service
  D. Azure Database Migration service

  ---

  Explanation

  Migrate from on-premises or cloud implementations of MongoDB to Azure Cosmos DB with minimal downtime by using Azure Database Migration Service. Perform resilient migrations of MongoDB data at scale and with high reliability.

  Scenario: Data migration from on-premises to Azure must minimize costs and downtime.

  The application uses MongoDB JSON document storage database for all container and transport information.

  References:

  https://azure.microsoft.com/en-us/updates/mongodb-to-azure-cosmos-db-online-andoffline-migrations-are-now-available/