Latest 70-487 Keys 2021

NEW QUESTION 1
DRAG DROP
You are developing an ASP.NET MVC Web API application. The application must meet the following requirements:
It must send or receive data without the use of a buffer.
It must allow up to 1 MB of data to be received.
It must allow up to 2 MB of data to be sent.
You need to complete the code to meet the requirements. You have the following code:

What code segments should you include in Target 1, Target 2, Target 3, Target 4, Target 5 and Target 6 to complete the code? (To answer, drag the appropriate code segments to the correct targets the answer area. Each code segment 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 2
You need to perform the initial deployment of the web application. You must ensure that the application meets the performance requirements.
Which file should you modify before you deploy the application?

• A. the service definition file (.csdef)
• B. the application configuration file (app.config)
• C. the packages configuration file (packages.config)
• D. the Global.asax file (.asax)

Answer: A

Explanation:
You use cscfg file to define various settings related to your cloud application (in ConfigurationSettings section). Like app.config file, you get to define other things (e.g.number of instances of your cloud application) in the cscfg file. You could change the settings in a cscfg file on the fly using either the portal or Service Management API without having to repackage and redeploy the application.
Scenario: After the initial deployment, any changes to the business logic of the Web API must cause minimal downtime to the web application in the production environment.

NEW QUESTION 3
You are developing an ASP.NET MVC application. The application is an order processing system that uses the ADO.NET Entity Framework against a SQL Server database. It has a controller that loads a page that displays customers. Customers are filtered on Country and, if provided, on CompanyName.
You have an Entity Framework context named db. The Customer class is shown below.

You need to execute a single deferred query to return the filtered list of customers. Which code segment should you use?

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

Answer: C

NEW QUESTION 4
DRAG DROP
You are developing an ASP.NET MVC Web API image management application. The application must meet the following requirements:
It must send or receive image data without the use of a buffer.
It must allow up to 4 MB of image data to be received.
It must allow up to 3 MB of image data to be sent.
You need to complete the code to meet the requirements.
What should you do? (To answer, drag the appropriate code segments to the correct location or locations in the answer area. Each code segment 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 5
You are preparing to develop a set of libraries that uses large data sets.
The libraries must be shared across an organization and distributed to several servers. You need to create a remote NuGet feed that exposes the libraries for developer use. What should you do? (Each answer presents part of the solution. Choose all that apply.)

• A. Add packages to the Packages folder.
• B. Create a new Empty Web Application in Visual Studio.
• C. Configure the Packages folder located in the appSettings section of the web application's Web.config.
• D. Install the NuGet.DataFeed Package.
• E. Install the NuGet.Server Package.
• F. Create a new Empty Web Site in Visual Studio.

Answer: ABCE

Explanation:
Creating Remote Feeds
You can host a remote (or internal) feed on a server that runs IIS. Step 1 (B): Create a new Empty Web Application in Visual Studio Step 2 (E): Install the NuGet.Server Package
Step 3 (C): Configure the Packages folder
Step 4 (A): Add Packages to the Packages folder
Step 5: Deploy and run your brand new Package Feed! Reference: Hosting Your Own NuGet Feeds

NEW QUESTION 6
HOTSPOT
You updating an existing multitenant ASP.NET MVC application for medical clinics. The application aggressively uses output caching to improve performance by caching content for 36 hours. The application uses a query string parameter named “clinicID” that contains the clinic that the user is currently viewing.
Users report that they are occasionally seeing data for the wrong clinic. Users also report that the application seems to take a long time to return data for a specific clinic even if they have viewed it recently.
You need to configure web.config to resolve the reported problems.
You have the following markup:

Which markup segments should you include in Target 1, Target 2 and Target 3 to complete the markup? (To answer, select the correct markup segment from each drop-down list in the answer area.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Target 1: noStore="false"
The page that has the OutputCacheProfile.NoStore property set to true issues a response specifying in its header to prevent secondary storage of sensitive information.
Target 2: VaryByParam ="clinicID"
The VaryByParam is a semicolon-delimited set of parameters used to vary the cached output. It allows varying the cached output by GET query string or form POST parameters. For instance, you can vary the user-control output to the cache by specifying the user- control name along with either a query string or a form POST parameter.
Incorrect: Not varyByControl="ClinicID"
The VaryByControl is a semicolon-delimited set of IDs of controls to be cached. Target 3: duration=129600"
The Duration represents the time in seconds that the page or user control is cached. Setting this property establishes an expiration policy for HTTP responses from the page or control to which it applies and will automatically cause the caching of their output.
129600 seconds is 36 hours (60*60*36).
References: https://msdn.microsoft.com/en-
us/library/system.web.configuration.outputcacheprofile(v=vs.110).aspx

NEW QUESTION 7
HOTSPOT
You are creating a streamed Windows Communication Foundation (WCF) service. You implement the following service methods.

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

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
To enable streaming, define the OperationContract appropriately and enable streaming at the transport level.
To stream data, the OperationContract for the service must satisfy two requirements:
References: https://docs.microsoft.com/en-us/dotnet/framework/wcf/feature-details/how-to-enable-streaming

NEW QUESTION 8
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 a REST API that uses Node.js. The API will store data in Azure Cosmos DB. You plan to deploy the API to a new Azure App Services Web App. You create a new Web App by using the Azure portal.
The API must be deployed by using SFTP.
You need to provide the proper deployment credentials to deploy the API.
Solution: Download the. PublishSettings file and enter the username and password located in the file.
Does the solution meet the goal?

• A. Yes
• B. No

Answer: A

Explanation:
Example:
# Get FTP publishing profile and query for publish URL and credentials
creds=($(az webapp deployment list-publishing-profiles --name $webappname --resource- group myResourceGroup
--query "[?contains(publishMethod, 'FTP')].[publishUrl,userName,userPWD]" --output tsv)) -- query "[?contains(publishMethod, 'FTP')].[publishUrl,userName,userPWD]" --output tsv))
References: https://docs.microsoft.com/en-us/azure/app-service/scripts/app-service-cli-deploy-ftp

NEW QUESTION 9
HOTSPOT
You are creating an application that retrieves Microsoft SQL Server data from two tables named Product and ProductModel.
You need to store in two separate lists all the names of the products and the product models for later use by the application.
How should you complete the code? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Box 1:
Two Select statements to get two results. Box 2: (Reader.Read());
The SqlDataReader.Read Method advances the SqlDataReader to the next record. The default position of the SqlDataReader is before the first record. Therefore, you must call Read to begin accessing any data.
Return Value
Type: System.Boolean
true if there are more rows; otherwise false. Box 3: Reader.NextResult();
The SqlDataReader.NextResult method advances the data reader to the next result, when reading the results of batch Transact-SQL statements. Used to process multiple results, which can be generated by executing batch Transact-SQL statements.
By default, the data reader is positioned on the first result. Box 4: (Reader.Read());
References: https://msdn.microsoft.com/en-
us/library/system.data.sqlclient.sqldatareader.nextresult(v=vs.110).aspx

NEW QUESTION 10
DRAG DROP
An XML file must be produced by the SaveFeaturedBooks() method of the Book class. The schema of the resulting XML file must be identical to the FeaturedBooks.xml file.
You need to write the code to produce the file. You have the following code:

Which code segments should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate code segments to the correct targets in the answer area. Each code segment 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)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 11
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 have developed a .NET Standard Library. You need to produce a NuGet package. Solution: Run the NuGet pack command Does the solution meet the goal?

• A. Yes
• B. No

Answer: A

Explanation:
Package the component with the NuGet pack command, for example: nuget pack AppLogger.nuspec
This generates AppLogger.YOUR_NAME.1.0.0.nupkg.
References: https://docs.microsoft.com/en-us/nuget/guides/create-net-standard-packages- vs2015

NEW QUESTION 12
You need to implement a solution that meets the logging requirements.
Which class should you use?

• A. RouteAttribute
• B. RoutePrefixAttribute
• C. AcceptVerbsAttribute
• D. ActionFilterAttribute

Answer: D

NEW QUESTION 13
DRAG DROP
You are developing an ASP.NET Core MVC web application. The application will use Entity Framework Core and a SQLite database.
You rename a property in the Customer data model. You attempt to apply the migration to the SQLite database and receive a NotSupportedException error that includes a table named Customer.
You need to resolve the migration error.
Which four actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
The SQLite provider has a number of migrations limitations. You can workaround some of these limitations by manually writing code in your migrations to perform a table rebuild. A table rebuild involves renaming the existing table, creating a new table, copying data to the new table, and dropping the old table.
References: https://docs.microsoft.com/en-us/ef/core/providers/sqlite/limitations

NEW QUESTION 14
You have a web application that was developed by using Microsoft ASP.NET MVC. The application is deployed to an Azure web app and uses an Azure SQL Database.
From a development environment, you use Microsoft Visual Studio to change the application code, and you modify the schema of the database.
You need to deploy the changes to Azure. Which publishing method should you use?

• A. BACPAC
• B. FTP
• C. Msdeploy
• D. Robocopy

Answer: A

Explanation:
You can deploy a .bacpac file to an Azure SQL Database using an Azure Resource Manager Template. .bacpac contains the schema and data necessary to deploy your database.
Note: A BACPAC file is a ZIP file with an extension of BACPAC containing the metadata and data from a SQL Server database. A BACPAC file can be stored in Azure blob storage or in local storage in an on-premises location and later imported back into Azure SQL Database or into a SQL Server on-premises installation.
References: https://docs.microsoft.com/en-us/azure/sql-database/sql-database-export

NEW QUESTION 15
You create a web application.
You deploy the application by using a Web Deploy Package.
You need to identify which setting will be created automatically in the SetParameters.xml file during the package generation.
Which three settings should you identify? Each correct answer presents part of the solution.

• A. the connection strings in the Web.config file
• B. the destination IIS web application path and name
• C. the service endpoints of the Web.config file
• D. the connection strings of any databases you add to the Package/Publish SQL tab on the Properties page of the project
• E. the application settings of the Web.config file

Answer: ABD

Explanation:
References: https://docs.microsoft.com/en-us/aspnet/web- forms/overview/deployment/web-deployment-in-the-enterprise/configuring-parameters-for-web-package-deployment

NEW QUESTION 16
You need to identify a solution to display the car brands. What should you include in the solution?

• A. Azure Automation
• B. Azure RemoteApp
• C. the Service Bus queue
• D. a virtual private network (VPN)
• E. the Service Bus topics
• F. the Service Bus relay
• G. ExpressRoute

Answer: C

Explanation:
Azure Service Bus Messaging can safely use the QueueClient object for sending messages from concurrent asynchronous operations and multiple threads.
Scenario: The action in the Web API that returns the car brand must be asynchronous, while all other actions must be synchronous.
References: https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-performance-improvements

NEW QUESTION 17
ReportApp will shut down every night. However, data from the searches performed during the night must still be collected.
You need to recommend a solution to meet the performance requirements for home.aspx. What should you recommend?

• A. ViewState
• B. MemoryCache
• C. OutputCache
• D. ApplicationCache

Answer: C

Explanation:
Scenario: When home.aspx is displayed, the rendered page must be cached for 10 minutes. Page output caching
The output of an action method on a controller can be cached using the [OutputCache]attribute on the method. Actions methods that return views will have the rendered page cached, while methods returning JSON data will have that data saved. A number of properties on the OutputCacheAttribute class control how data is cached.
CacheProfile- If a number of methods will have the same cache settings, it makes sense to use the web.config file to create a cache profile that can be used across all these methods.
The Duration attribute of the CacheProfile determines how long, in seconds, the output should be cached. To save an item for 10 minutes, duration would be set to 600.
[OutputCache(Duration=600)]
References: http://failedturing.blogspot.se/2014/10/microsoft-70-486-design-caching- strategy.html

NEW QUESTION 18
DRAG DROP
You are developing a RESTful application by using ASP.NET MVC. The application is a pet management system and implements the following method in a controller for retrieving pet dat
a.

The method must only accept JSON data using the standard MIME type.
You need to implement a controller that saves pet data and return a properly formatted HTTP/1.1 protocol response.
You have the following code:

Which code segments should you include in Target 1, Target 2, Target 3 and Target 4 to
complete the code? {To answer, drag the appropriate code segments to the correct targets in the answer area. Each code segment 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 19
DRAG DROP
You need to build the connection from ReportApp to read the search dat

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
References:
https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-dotnet-get-started-with-queues
https://docs.microsoft.com/en-us/azure/service-bus-messaging/service-bus-queues-topics- subscriptions
Case Study: 5
Trey Research Inc
Overview
Trey Research Inc. is a Software-as-a-Service (SaaS) company that provides hosted solutions for business partners around the world. The company is developing a solution that will allow business partners to manage events, including shareholder meetings and trade shows.
You hold meetings with key partners to identify requirements and constraints for the solution. You must minimize costs where possible.
You work with an Azure solutions architect to design the logical structure for the solution. The solution will use the following architecture:

Solution components
The solution will use Azure Traffic Manager to distribute traffic. The solution will use API Management to provide caching for the Event Service. Partner companies will interact with the solution by using the Event Service API. This API will be implemented as an ASP.NET Core Web API that runs as an Azure Web App. Event data will be stored in Cosmos DB using the Document API.
The solution will be highly available. You define regional Azure outages as periods of 60 seconds or more where the Event Service is not available.
An Azure WebJob named EventJob will be deployed with the Event Service Web App. The WebJob:
Creates new computed events when partner events are created.
Must be active whenever the Event Service is running.
Is updated once a quarter.
Trey Research Inc. has developer teams that work with a variety of operating systems including Windows, Linux, and MacOS.
Event Service
Individual events must be immutable. Event data can be up to 800 kilobytes (KB) in size. The Event Service must meet the following requirements:
Use REST-based design
Cache data whenever possible.
Support both JSON and XML-based data.
Log customer information whenever data is modified.
Include the X-Customer header in all calls to identify the partner. Regional access to the Event Service API
Data for partners in Germany and Brazil must be served from Azure datacenters in their respective geographies unless there is a regional Azure outage. All other partners must use the US West Azure datacenter.
Testing
All testing must interact directly with the Web App backend. Automated testing of the solution is performed using a remote third-party testing solution.
Event data
You identify the following requirements for the event data store:
Each partner’s event data must be stored in a Collection that is specific to the partner.
Event data must be available if a regional Azure outage occurs.
Event read and write operations for a single partner must always store events in the correct order.
Event API
Relevant portions of the app files are shown below. Line numbers are included for reference only and include a two-character prefix that denotes the specific file to which they belong.




Event processing
Relevant portions of the app files are shown below. Line numbers are included for reference only and include a two-character prefix that denotes the specific file to which they belong.


Middleware Relevant portions of the app files are shown below. Line numbers are included for reference only and include a two-character prefix that denotes the specific file to which they belong.

NEW QUESTION 20
DRAG DROP
You are developing a Windows Communication Foundation (WCF) service named WCF1. WCF1 will use a certificate to secure the communication channel.
You need to ensure that the WCF service uses a certificate to secure the communication channel.
How should you complete the code? To answer, drag the appropriate code blocks to the correct locations. Each code block 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.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Target 1: ClientCredentialType
Target 2: MessageCredentialType.Certificate
Set the ClientCredential property to an appropriate value. The following code sets the property to Certificate.
WSHttpBinding b = new WSHttpBinding(); b.Security.Mode = SecurityMode.Message;
b.Security.Message.ClientCredentialType = MessageCredentialType.Certificate; Target 3: SetCertificate
On the client class, set the ClientCredentials property of the ClientBase<TChannel> class to an appropriate value.
Example: // Set the certificate for the client. cc.ClientCredentials.ClientCertificate.SetCertificate( StoreLocation.LocalMachine,
StoreName.My, X509FindType.FindBySubjectName, "cohowinery.com");
References: https://docs.microsoft.com/en-us/dotnet/framework/wcf/how-to-set-the- security-mode
https://docs.microsoft.com/en-us/dotnet/framework/wcf/how-to-specify-client-credential- values

NEW QUESTION 21
DRAG DROP
You are developing an ASP.NET Web API application that will be consumed by a web browser via a composite application that is served from another web domain.
You need to configure the Web API.
What should you do? (To answer, drag the appropriate XML elements to the correct location or locations in the answer area. Each XML element 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 22
DRAG DROP
You are developing an ASP.NET MVC Web API application.
The methods of the Web API must return details about the result of the operation. You need to create a method to add products.
You have the following code:

Which code segments should you include in Target 1, Target 2, Target 3, Target 4 and Target 5 to complete the code? {To answer, drag the appropriate code segments to the correct targets in the answer area. Each code segment 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 23
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 a RESTful API that uses ASP.NET Core. You plan to host the API in Azure App Services. You provision a development environment in the application service.
Developers must be able to deploy the API to the development environment. You must not share the Azure account credentials with developers.
You need to ensure that developers can deploy the API to the development environment.
Solution: Add the developers to the same Azure Active Directory (Azure AD) as the Azure subscription in which the App Service is provisioned. Use XCopy to deploy to the App Service.
Does the solution meet the goal?

• A. Yes
• B. No

Answer: B

Explanation:
You should use a Publishing Profile with Microsoft Visual Studio Publishing.
References: https://msdn.microsoft.com/en-us/library/dd465337(v=vs.110).aspx

NEW QUESTION 24
You have a web server that hosts several web applications.
From Microsoft Visual Studio, you create an assembly that is signed.
You need to make the assembly available to all of the web applications on the web server. The solution must minimize the number of copies of the assembly.
Which tool should you run?

• A. gacutil.exe
• B. sn.exe
• C. tlbImp.exe
• D. regasm.exe

Answer: B

Explanation:
Strong Name Scenario
The following scenario outlines the process of signing an assembly with a strong name and later referencing it by that name.
Assembly A is created with a strong name using one of the following methods:
References: https://docs.microsoft.com/en-us/dotnet/framework/app-domains/create-and- use-strong-named-assemblies

NEW QUESTION 25
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