Microsoft Microsoft Certifications AZ-204 Questions & Answers

• Question 411:

  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 are developing an Azure Service application that processes queue data when it receives a message from a mobile application. Messages may not be sent to the service consistently.

  You have the following requirements:

  1.

  Queue size must not grow larger than 80 gigabytes (GB).

  2.

  Use first-in-first-out (FIFO) ordering of messages.

  3.

  Minimize Azure costs.

  You need to implement the messaging solution.

  Solution: Use the .Net API to add a message to an Azure Storage Queue from the mobile application. Create an Azure VM that is triggered from Azure Storage Queue events.

  Does the solution meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  Don't use a VM, instead create an Azure Function App that uses an Azure Service Bus Queue trigger.

  Reference: https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-storage-queue-triggered-function

• Question 412:

  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 are developing an Azure solution to collect point-of-sale (POS) device data from 2,000 stores located throughout the world. A single device can produce 2 megabytes (MB) of data every 24 hours. Each store location has one to five

  devices that send data.

  You must store the device data in Azure Blob storage. Device data must be correlated based on a device identifier. Additional stores are expected to open in the future.

  You need to implement a solution to receive the device data.

  Solution: Provision an Azure Event Grid. Configure event filtering to evaluate the device identifier.

  Does the solution meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  Instead use an Azure Service Bus, which is used order processing and financial transactions.

  Note: An event is a lightweight notification of a condition or a state change. Event hubs is usually used reacting to status changes.

  Reference:

  https://docs.microsoft.com/en-us/azure/event-grid/compare-messaging-services

• Question 413:

  You are developing a solution that will use Azure messaging services.

  You need to ensure that the solution uses a publish-subscribe model and eliminates the need for constant polling.

  What are two possible ways to achieve the goal? Each correct answer presents a complete solution.

  NOTE: Each correct selection is worth one point.

  A. Service Bus

  B. Event Hub

  C. Event Grid

  D. Queue

  Correct Answer: AC

  It is strongly recommended to use available messaging products and services that support a publish-subscribe model, rather than building your own. In Azure, consider using Service Bus or Event Grid. Other technologies that can be used for pub/sub messaging include Redis, RabbitMQ, and Apache Kafka.

  Reference: https://docs.microsoft.com/en-us/azure/architecture/patterns/publisher-subscriber

• Question 414:

  A company is implementing a publish-subscribe (Pub/Sub) messaging component by using Azure Service Bus. You are developing the first subscription application.

  In the Azure portal you see that messages are being sent to the subscription for each topic. You create and initialize a subscription client object by supplying the correct details, but the subscription application is still not consuming the

  messages.

  You need to ensure that the subscription client processes all messages.

  Which code segment should you use?

  A. await subscriptionClient.AddRuleAsync(new RuleDescription(RuleDescription.DefaultRuleName, new TrueFilter()));

  B. subscriptionClient = new SubscriptionClient(ServiceBusConnectionString, TopicName, SubscriptionName);

  C. await subscriptionClient.CloseAsync();

  D. subscriptionClient.RegisterMessageHandler(ProcessMessageAsync, messageHandlerOptions);

  Correct Answer: D

  Using topic client, call RegisterMessageHandler which is used to receive messages continuously from the entity. It registers a message handler and begins a new thread to receive messages. This handler is waited on every time a new message is received by the receiver.

  subscriptionClient.RegisterMessageHandler(ReceiveMessagesAsync, messageHandlerOptions);

  Reference: https://www.c-sharpcorner.com/article/azure-service-bus-topic-and-subscription-pub-sub/

• Question 415:

  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 are developing an Azure solution to collect point-of-sale (POS) device data from 2,000 stores located throughout the world. A single device can produce 2 megabytes (MB) of data every 24 hours. Each store location has one to five

  devices that send data.

  You must store the device data in Azure Blob storage. Device data must be correlated based on a device identifier. Additional stores are expected to open in the future.

  You need to implement a solution to receive the device data.

  Solution: Provision an Azure Service Bus. Configure a topic to receive the device data by using a correlation filter.

  Does the solution meet the goal?

  A. Yes

  B. No

  Correct Answer: A

  A message is raw data produced by a service to be consumed or stored elsewhere. The Service Bus is for high-value enterprise messaging, and is used for order processing and financial transactions.

  Reference: https://docs.microsoft.com/en-us/azure/event-grid/compare-messaging-services

• Question 416:

  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 are developing an Azure Service application that processes queue data when it receives a message from a mobile application. Messages may not be sent to the service consistently.

  You have the following requirements:

  1.

  Queue size must not grow larger than 80 gigabytes (GB).

  2.

  Use first-in-first-out (FIFO) ordering of messages.

  3.

  Minimize Azure costs.

  You need to implement the messaging solution.

  Solution: Use the .Net API to add a message to an Azure Service Bus Queue from the mobile application. Create an Azure Function App that uses an Azure Service Bus Queue trigger.

  Does the solution meet the goal?

  A. Yes

  B. No

  Correct Answer: A

  You can create a function that is triggered when messages are submitted to an Azure Storage queue.

  Reference: https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-storage-queue-triggered-function

• Question 417:

  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 are developing an Azure solution to collect point-of-sale (POS) device data from 2,000 stores located throughout the world. A single device can produce 2 megabytes (MB) of data every 24 hours. Each store location has one to five

  devices that send data.

  You must store the device data in Azure Blob storage. Device data must be correlated based on a device identifier. Additional stores are expected to open in the future.

  You need to implement a solution to receive the device data.

  Solution: Provision an Azure Notification Hub. Register all devices with the hub.

  Does the solution meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  Instead use an Azure Service Bus, which is used order processing and financial transactions.

  Reference: https://docs.microsoft.com/en-us/azure/event-grid/compare-messaging-services

• Question 418:

  You are a developer for a SaaS company that offers many web services.

  All web services for the company must meet the following requirements:

  Use API Management to access the services

  Use OpenID Connect for authentication

  Prevent anonymous usage

  A recent security audit found that several web services can be called without any authentication.

  Which API Management policy should you implement?

  A. jsonp

  B. authentication-certificate

  C. check-header

  D. validate-jwt

  Correct Answer: D

  Add the validate-jwt policy to validate the OAuth token for every incoming request. Incorrect Answers:

  A: The jsonp policy adds JSON with padding (JSONP) support to an operation or an API to allow cross-domain calls from JavaScript browser-based clients. JSONP is a method used in JavaScript programs to request data from a server in a different domain. JSONP bypasses the limitation enforced by most web browsers where access to web pages must be in the same domain.

  JSONP - Adds JSON with padding (JSONP) support to an operation or an API to allow cross-domain calls from JavaScript browser-based clients.

  Reference: https://docs.microsoft.com/en-us/azure/api-management/api-management-howto-protect-backend-with-aad

• Question 419:

  You have a new Azure subscription. You are developing an internal website for employees to view sensitive data. The website uses Azure Active Directory (Azure AD) for authentication.

  You need to implement multifactor authentication for the website.

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

  NOTE: Each correct selection is worth one point.

  A. Configure the website to use Azure AD B2C.

  B. In Azure AD, create a new conditional access policy.

  C. Upgrade to Azure AD Premium.

  D. In Azure AD, enable application proxy.

  E. In Azure AD conditional access, enable the baseline policy.

  Correct Answer: BC

  B: MFA Enabled by conditional access policy. It is the most flexible means to enable two-step verification for your users. Enabling using conditional access policy only works for Azure MFA in the cloud and is a premium feature of Azure AD.

  C: Multi-Factor Authentication comes as part of the following offerings:

  Azure Active Directory Premium licenses - Full featured use of Azure Multi-Factor Authentication Service (Cloud) or Azure Multi-Factor Authentication Server (On-premises).

  Multi-Factor Authentication for Office 365

  Azure Active Directory Global Administrators

  Reference:

  https://docs.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-getstarted

• Question 420:

  You are developing an ASP.NET Core Web API web service. The web service uses Azure Application Insights for all telemetry and dependency tracking. The web service reads and writes data to a database other than Microsoft SQL Server.

  You need to ensure that dependency tracking works for calls to the third-party database.

  Which two dependency telemetry properties should you use? Each correct answer presents part of the solution.

  NOTE: Each correct selection is worth one point.

  A. Telemetry.Context.Cloud.RoleInstance

  B. Telemetry.Id

  C. Telemetry.Name

  D. Telemetry.Context.Operation.Id

  E. Telemetry.Context.Session.Id

  Correct Answer: BD

  Example:

  public async Task Enqueue(string payload)

  {

  // StartOperation is a helper method that initializes the telemetry item

  // and allows correlation of this operation with its parent and children.

  var operation = telemetryClient.StartOperation("enqueue " + queueName);

  operation.Telemetry.Type = "Azure Service Bus";

  operation.Telemetry.Data = "Enqueue " + queueName;

  var message = new BrokeredMessage(payload);

  // Service Bus queue allows the property bag to pass along with the message.

  // We will use them to pass our correlation identifiers (and other context)

  // to the consumer.

  message.Properties.Add("ParentId", operation.Telemetry.Id);

  message.Properties.Add("RootId", operation.Telemetry.Context.Operation.Id);

  Reference:

  https://docs.microsoft.com/en-us/azure/azure-monitor/app/custom-operations-tracking