Microsoft Microsoft Certifications AZ-204 Questions & Answers

• Question 161:

  HOTSPOT

  You are implementing a software as a service (SaaS) ASP.NET Core web service that will run as an Azure Web App. The web service will use an on-premises SQL Server database for storage. The web service also includes a WebJob that processes data updates. Four customers will use the web service.

  1.

  Each instance of the WebJob processes data for a single customer and must run as a singleton instance.

  2.

  Each deployment must be tested by using deployment slots prior to serving production data.

  3.

  Azure costs must be minimized.

  4.

  Azure resources must be located in an isolated network.

  You need to configure the App Service plan for the Web App.

  How should you configure the App Service plan? To answer, select the appropriate settings in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Number of VM instances: 4

  You are not charged extra for deployment slots.

  Pricing tier: Isolated

  The App Service Environment (ASE) is a powerful feature offering of the Azure App Service that gives network isolation and improved scale capabilities. It is essentially a deployment of the Azure App Service into a subnet of a customer's

  Azure Virtual Network (VNet).

  References:

  https://azure.microsoft.com/sv-se/blog/announcing-app-service-isolated-more-power-scale-and-ease-of-use/

• Question 162:

  HOTSPOT

  You are creating a CLI script that creates an Azure web app and related services in Azure App Service. The web app uses the following variables:

  

  You need to automatically deploy code from Git-Hub to the newly created web app.

  How should you complete the script? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: az appservice plan create

  The azure group creates command successfully returns JSON result. Now we can use resource group to create a azure app service plan

  Box 2: az webapp create

  Create a new web app..

  Box 3: --plan $webappname

  ..with the serviceplan we created in step 1.

  Box 4: az webapp deployment

  Continuous Delivery with GitHub. Example:

  az webapp deployment source config --name firstsamplewebsite1 --resource-group websites--repo-url $gitrepo --branch master --git-token $token

  Box 5: --repo-url $gitrepo --branch master --manual-integration

  Reference:

  https://medium.com/@satish1v/devops-your-way-to-azure-web-apps-with-azure-cli-206ed4b3e9b1

• Question 163:

  HOTSPOT

  You are building a traffic monitoring system that monitors traffic along six highways. The system produces time series analysis-based reports for each highway. Data from traffic sensors are stored in Azure Event Hub.

  Traffic data is consumed by four departments. Each department has an Azure Web App that displays the time series-based reports and contains a WebJob that processes the incoming data from Event Hub. All Web Apps run on App Service

  Plans with three instances.

  Data throughput must be maximized. Latency must be minimized.

  You need to implement the Azure Event Hub.

  Which settings should you use? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: 6

  The number of partitions is specified at creation and must be between 2 and 32.

  There are 6 highways.

  Box 2: Highway

  Reference:

  https://docs.microsoft.com/en-us/azure/event-hubs/event-hubs-features

• Question 164:

  HOTSPOT

  You are developing a ticket reservation system for an airline.

  The storage solution for the application must meet the following requirements:

  1.

  Ensure at least 99.99% availability and provide low latency.

  2.

  Accept reservations event when localized network outages or other unforeseen failures occur.

  3.

  Process reservations in the exact sequence as reservations are submitted to minimize overbooking or selling the same seat to multiple travelers.

  4.

  Allow simultaneous and out-of-order reservations with a maximum five-second tolerance window.

  You provision a resource group named airlineResourceGroup in the Azure South-Central US region.

  You need to provision a SQL SPI Cosmos DB account to support the app.

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

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: BoundedStaleness

  Bounded staleness: The reads are guaranteed to honor the consistent-prefix guarantee. The reads might lag behind writes by at most "K" versions (that is, "updates") of an item or by "T" time interval. In other words, when you choose

  bounded staleness, the "staleness" can be configured in two ways:

  The number of versions (K) of the item

  The time interval (T) by which the reads might lag behind the writes

  Incorrect Answers:

  Strong

  Strong consistency offers a linearizability guarantee. Linearizability refers to serving requests concurrently. The reads are guaranteed to return the most recent committed version of an item. A client never sees an uncommitted or partial write.

  Users are always guaranteed to read the latest committed write.

  Box 2: --enable-automatic-failover true\

  For multi-region Cosmos accounts that are configured with a single-write region, enable automatic-failover by using Azure CLI or Azure portal. After you enable automatic failover, whenever there is a regional disaster, Cosmos DB will

  automatically failover your account.

• Question 165:

  HOTSPOT

  You are using Azure Front Door Service.

  You are expecting inbound files to be compressed by using Brotli compression. You discover that inbound XML files are not compressed. The files are 9 megabytes (MB) in size.

  You need to determine the root cause for the issue.

  To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: No

  Front Door can dynamically compress content on the edge, resulting in a smaller and faster response to your clients. All files are eligible for compression. However, a file must be of a MIME type that is eligible for compression list.

  Box 2: No

  Sometimes you may wish to purge cached content from all edge nodes and force them all to retrieve new updated assets. This might be due to updates to your web application, or to quickly update assets that contain incorrect information.

  Box 3: Yes

  These profiles support the following compression encodings: Gzip (GNU zip), Brotli

  Reference:

  https://docs.microsoft.com/en-us/azure/frontdoor/front-door-caching

• Question 166:

  HOTSPOT

  You are developing an application that uses Azure Storage Queues.

  You have the following code:

  

  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: No

  The QueueDescription.LockDuration property gets or sets the duration of a peek lock; that is, the amount of time that the message is locked for other receivers. The maximum value for LockDuration is 5 minutes; the default value is 1 minute.

  Box 2: Yes

  You can peek at the message in the front of a queue without removing it from the queue by calling the PeekMessage method.

  Box 3: Yes

  Reference:

  https://docs.microsoft.com/en-us/azure/storage/queues/storage-dotnet-how-to-use-queues

  https://docs.microsoft.com/en-us/dotnet/api/microsoft.servicebus.messaging.queuedescription.lockduration

• Question 167:

  HOTSPOT

  You are developing an Azure App Service hosted ASP.NET Core web app to deliver video on-demand streaming media. You enable an Azure Content Delivery Network (CDN) Standard for the web endpoint. Customer videos are downloaded

  from the web app by using the following example URL.: http://www.contoso.com/content.mp4?quality=1

  All media content must expire from the cache after one hour. Customer videos with varying quality must be delivered to the closest regional point of presence (POP) node.

  You need to configure Azure CDN caching rules.

  Which options should you use? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: Override

  Override: Ignore origin-provided cache duration; use the provided cache duration instead. This will not override cache-control: no-cache.

  Set if missing: Honor origin-provided cache-directive headers, if they exist; otherwise, use the provided cache duration.

  Incorrect:

  Bypass cache: Do not cache and ignore origin-provided cache-directive headers.

  Box 2: 1 hour

  All media content must expire from the cache after one hour.

  Box 3: Cache every unique URL

  Cache every unique URL: In this mode, each request with a unique URL, including the query string, is treated as a unique asset with its own cache. For example, the response from the origin server for a request for example.ashx?q=test1 is

  cached at the POP node and returned for subsequent caches with the same query string. A request for example.ashx?q=test2 is cached as a separate asset with its own time-to-live setting.

  Incorrect Answers:

  Bypass caching for query strings: In this mode, requests with query strings are not cached at the CDN POP node. The POP node retrieves the asset directly from the origin server and passes it to the requestor with each request.

  Ignore query strings: Default mode. In this mode, the CDN point-of-presence (POP) node passes the query strings from the requestor to the origin server on the first request and caches the asset. All subsequent requests for the asset that are

  served from the POP ignore the query strings until the cached asset expires.

  Reference:

  https://docs.microsoft.com/en-us/azure/cdn/cdn-query-string

• Question 168:

  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.

  Hot Area:

  

  Correct Answer:

  

  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 169:

  HOTSPOT

  You are working for Contoso, Ltd.

  You define an API Policy object by using the following XML markup:

  

  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

  Use the set-backend-service policy to redirect an incoming request to a different backend than the one specified in the API settings for that operation. Syntax:

  Box 2: No

  The condition is on 512k, not on 256k.

  Box 3: No

  The set-backend-service policy changes the backend service base URL of the incoming request to the one specified in the policy.

  Reference:

  https://docs.microsoft.com/en-us/azure/api-management/api-management-transformation-policies

• Question 170:

  HOTSPOT

  A company develops a series of mobile games. All games use a single leaderboard service. You have the following requirements:

  1.

  Code should be scalable and allow for growth.

  2.

  Each record must consist of a playerld, gameld. 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 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:

  

  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: