Microsoft Microsoft Certifications AZ-204 Questions & Answers

• Question 171:

  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.)

  

  For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point

  Hot Area:

  

  Correct Answer:

  

• Question 172:

  HOTSPOT

  You are working for a company that designs mobile applications. They maintain a server where player records are assigned to their different games. The tracking system is new and in development.

  The application uses Entity Framework to connect to an Azure Database. The database holds a Player table and Game table.

  When adding a player, the code should insert a new player record, and add a relationship between an existing game record and the new player record.

  The application will call CreatePlayerWithGame with the correct gameld and the playerld to start the process. (Line numbers are included for reference only.)

  

  For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point

  Hot Area:

  

  Correct Answer:

  

  Many-to-many relationships without an entity class to represent the join table are not yet supported. However, you can represent a many-to-many relationship by including an entity class for the join table and mapping two separate one-tomany relationships.

  protected override void OnModelCreating(ModelBuilder modelBuilder) {

  modelBuilder.Entity()

  HasKey(t => new { t.PostId, t.TagId });

  modelBuilder.Entity()

  HasOne(pt => pt.Post)

  WithMany(p => p.PostTags)

  HasForeignKey(pt => pt.PostId);

  modelBuilder.Entity()

  HasOne(pt => pt.Tag)

  WithMany(t => t.PostTags)

  HasForeignKey(pt => pt.TagId);

  }

  }

• Question 173:

  HOTSPOT

  You develop a news and blog content delivery app for Windows devices.

  A notification must arrive on a user's device when there is a new article available for them to view.

  You need to implement push notifications.

  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.

  Hot Area:

  

  Correct Answer:

  

  Box 1: NotificationHubClient

  Box 2: NotificationHubClient

  Box 3: CreateClientFromConnectionString

  // Initialize the Notification Hub

  NotificationHubClient hub =

  NotificationHubClient.CreateClientFromConnectionString(listenConnString, hubName);

  Box 4: SendWindowsNativeNotificationAsync

  Send the push notification.

  var result = await hub.SendWindowsNativeNotificationAsync(windowsToastPayload);

  References:

  https://docs.microsoft.com/en-us/azure/notification-hubs/notification-hubs-push-notification- registration-management

  https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/app-service-mobile/app- service-mobile-windows-store-dotnet-get-started-push.md

• Question 174:

  HOTSPOT

  You are creating an app that uses Event Grid to connect with other services. Your app's event data will be sent to a serverless function that checks compliance. This function is maintained by your company.

  You write a new event subscription at the scope of your resource. The event must be invalidated after 3 specific period of time. You need to configure Event Grid to ensure security.

  What should you implement? To answer, select the appropriate options in the answer area;

  NOTE: Each correct selection is worth one point

  Hot Area:

  

  Correct Answer:

  

  Box 1: SAS tokens

  Custom topics use either Shared Access Signature (SAS) or key authentication.

  Microsoft recommends SAS, but key authentication provides simple programming, and is compatible with many existing webhook publishers.

  In this case we need the expiration time provided by SAS tokens.

  Box 2: ValidationCode handshake

  Event Grid supports two ways of validating the subscription: ValidationCode handshake (programmatic) and ValidationURL handshake (manual).

  If you control the source code for your endpoint, this method is recommended.

  Incorrect Answers:

  ValidationURL handshake (manual): In certain cases, you can't access the source code of the endpoint to implement the ValidationCode handshake. For example, if you use a third-party service (like Zapier or IFTTT), you can't

  programmatically respond with the validation code.

  References:

  https://docs.microsoft.com/en-us/azure/event-grid/security-authentication

• Question 175:

  HOTSPOT

  You are debugging an application that is running on Azure Kubernetes cluster named cluster1. The cluster uses Azure Monitor for containers to monitor the cluster.

  The application has sticky sessions enabled on the ingress controller.

  Some customers report a large number of errors in the application over the last 24 hours.

  You need to determine on which virtual machines (VMs) the errors are occurring.

  How should you complete the Azure Monitor query? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: ago(1d)

  Box 2: distinct containerID

  Box 3: where ContainerID in (ContainerIDs)

  Box 4: summarize Count by Computer Summarize: aggregate groups of rows Use summarize to identify groups of records, according to one or more columns, and apply aggregations to them. The most common use of summarize is count, which returns the number of results in each group.

  Reference: https://docs.microsoft.com/en-us/azure/azure-monitor/log-query/get-started-queries https://docs.microsoft.com/en-us/azure/azure-monitor/log-query/query-optimization

• Question 176:

  HOTSPOT

  You are developing a solution that uses the Azure Storage Client library for .NET. You have the following code: (Line numbers are included for reference only.)

  

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

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: Yes

  AcquireLeaseAsync does not specify leaseTime.

  leaseTime is a TimeSpan representing the span of time for which to acquire the lease, which will be rounded down to seconds. If null, an infinite lease will be acquired. If not null, this must be 15 to 60 seconds.

  Box 2: No

  The GetBlockBlobReference method just gets a reference to a block blob in this container.

  Box 3: Yes

  The BreakLeaseAsync method initiates an asynchronous operation that breaks the current lease on this container.

  Reference:

  https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.storage.blob.cloudblobcontainer.acquireleaseasync

  https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.storage.blob.cloudblobcontainer.getblockblobreference

  https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.storage.blob.cloudblobcontainer.breakleaseasync

• Question 177:

  HOTSPOT

  A company develops a series of mobile games. All games use a single leaderboard service.

  You have the following requirements:

  1.

  Code must be scalable and allow for growth.

  2.

  Each record must consist of a playerId, gameId, score, and time played.

  3.

  When users reach a new high score, the system will save the new score using the SaveScore function below.

  4.

  Each game is assigned an Id based on the series title.

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

  

  You develop the following code to save scores in the data store. (Line numbers are included for reference only.)

  

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

  

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

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: Yes

  Create a table.

  A CloudTableClient object lets you get reference objects for tables and entities. The following code creates a CloudTableClient object and uses it to create a new CloudTable object, which represents a table

  // Retrieve storage account from connection-string.

  CloudStorageAccount storageAccount =

  CloudStorageAccount.parse(storageConnectionString);

  // Create the table client.

  CloudTableClient tableClient = storageAccount.createCloudTableClient();

  // Create the table if it doesn't exist.

  String tableName = "people";

  CloudTable cloudTable = tableClient.getTableReference(tableName);

  cloudTable.createIfNotExists();

  Box 2: No

  New records are inserted with TableOperation.insert. Old records are not updated.

  To update old records TableOperation.insertOrReplace should be used instead.

  Box 3: No

  Box 4: Yes

  Reference:

  https://docs.microsoft.com/en-us/azure/cosmos-db/table-storage-how-to-use-java

• Question 178:

  DRAG DROP

  You are authoring a set of nested Azure Resource Manager templates to deploy multiple Azure resources.

  The templates must be tested before deployment and must follow recommended practices.

  You need to validate and test the templates before deployment.

  Which tools should you use? To answer, drag the appropriate tools to the correct requirements. Each tool may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

  NOTE: Each correct selection is worth one point.

  Select and Place:

  

  Correct Answer:

  

• Question 179:

  DRAG DROP

  You develop and deploy a Java application to Azure. The application has been instrumented by using the Application Insights SDK.

  The telemetry data must be enriched and processed before it is sent to the Application Insights service.

  You need to modify the telemetry data.

  Which Application Insights SDK features should you use? To answer, drag the appropriate features to the correct requirements. Each feature may be used once, more than once, or not at all. You may need to drag the split bar between panes

  or scroll to view content.

  NOTE: Each correct selection is worth one point.

  Select and Place:

  

  Correct Answer:

  

• Question 180:

  DRAG DROP

  You are Implementing an Azure solution that uses Azure Cosmos DB and the latest Azure Cosmos DB SDK. You add a change feed processor to a new container instance.

  You attempt to lead a batch of 100 documents. The process falls when reading one of the documents. The solution must monitor the progress of the change feed processor instance on the new container as the change feed is read. You must

  prevent the change feed processor from retrying the entire batch when one document cannot be read.

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

  Which features should you use? To answer, drag the appropriate features to the correct requirements. Each feature may be used once, More than once, or not at all. You may need to drag The split bat between panes or scroll to view content.

  Each correct selection is worth one point

  Select and Place:

  

  Correct Answer: