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Developing ASP.NET MVC 4 Web Applications

Question No: 81 – (Topic 4)

You develop an ASP.NET MVC application. The application is configured for claims-based authentication by using Windows Identity Foundation (WIF).

You need to access the claims in the WIF token. Which code segment should you use?

  1. Thread.CurrentPrincipal.Identity;

  2. ((IClaimsPrincipal)Thread.CurrentPrincipal).Identities[0].Claims;

  3. Thread.CurrentPrincipal;

  4. ((IClaimsPrincipal)Thread.CurrentPrincipal).Identities[0].IsAuthenticated;

Answer: B Explanation:

To Access the Claims

In order to access identity related information, you can run FedUtil. Once you have run FedUtil, your application can access IClaimsPrincipal and IClaimsIdentity using the standard ASP.NET constructs as shown in the following code example:

void Page_Load(object sender, EventArgs e)

{

// Cast the Thread.CurrentPrincipal

IClaimsPrincipal icp = Thread.CurrentPrincipal as IClaimsPrincipal;

// Access IClaimsIdentity which contains claims IClaimsIdentity claimsIdentity = (IClaimsIdentity)icp.Identity;

// Access claims

foreach(Claim claim in claimsIdentity.Claims)

{

}

}

References: https://msdn.microsoft.com/en-us/library/ee517271.aspx

Question No: 82 – (Topic 4)

You are developing a controller for an ASP.NET MVC application that manages message board postings.

The security protection built in to ASP.NET is preventing users from saving their HTML.

You need to enable users to edit and save their HTML while maintaining existing security protection measures.

Which code segment should you use?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: B

Question No: 83 – (Topic 4)

You are developing an ASP.NET MVC application that uses forms authentication against a third-party database.

You need to authenticate the users. Which code segment should you use?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: D Explanation:

ASP.NET membership is designed to enable you to easily use a number of different membership providers for your ASP.NET applications.

There are two primary reasons for creating a custom membership provider.

  • You need to store membership information in a data source that is not supported by the membership providers included with the .NET Framework, such as a FoxPro database, an Oracle database, or other data sources.

  • You need to manage membership information using a database schema that is different from the database schema used by the providers that ship with the .NET Framework.

To implement a membership provider, you create a class that inherits the MembershipProvider abstract class from the System.Web.Security namespace.

Incorrect:

Not C: Class ProviderBase

The provider model is intended to encapsulate all or part of the functionality of multiple ASP.NET features, such as membership, profiles, and protected configuration.

References: https://msdn.microsoft.com/en-us/library/f1kyba5e.aspx

Question No: 84 – (Topic 4)

You are developing an application that uses many small images. When the images load, the application runs slowly.

You need to improve the performance of the application. What should you do?

  1. Preload all the images when the application starts to ensure that the images are cached.

  2. Convert the images to ICO file format and stream all images on a single connection.

  3. Host all images on a Microsoft Azure web role with multiple instances.

  4. Combine all the images into a single image and use CSS to create sprites.

Answer: D Explanation:

Because browsers limit how many concurrent HTTP requests they make to a website, a web page with many small icon images can result in a longer load time. You can combine many small images into a single larger image – a CSS sprite – using the free ASP.NET Sprite and Image Optimization Library available from Microsoft.

References:

Question No: 85 – (Topic 4)

You are designing a distributed application that runs on the Windows Azure platform.

The application must store a small amount of insecure global information that does not change frequently.

You need to configure the application to meet the requirements.

Which server-side state management option should you use? (Each correct answer presents a complete solution. Choose all that apply.)

  1. Windows Azure application state

  2. SQL Azure

  3. Profile properties of the Windows Azure application

  4. Windows Azure session state

Answer: B Explanation:

SQL Database provides a relational database management system for Windows Azure and is based on SQL Server technology. With a SQL Database instance, you can easily provision and deploy relational database solutions to the cloud, and take advantage of a distributed data center that provides enterprise-class availability, scalability, and security with the benefits of built-in data protection and self-healing.

Incorrect:

Not A: Application State does not exist in Azure.

Not C: Profile properties stores personal, not global, information.

Not D: Session state is not global. Session states handles user information such as cookies, hidden fields, and query strings are some client-side options to tracking user state

Question No: 86 – (Topic 4)

You are developing an ASP.NET MVC application that uses forms authentication to verify that the user is logged in.

Authentication credentials must be encrypted and secure so no user identity is exposed. You need to ensure that user credentials are persisted after users log on.

Where should you store the credentials? (Each correct answer presents a complete solution. Choose all that apply.)

  1. In Session on the server

  2. In a cookie stored in the browser

  3. In ViewData in the application

  4. In TempData on the server

    Answer: A,B Explanation:

    Server sessions and cookies can both be configured to secure and they both persist after the users log on.

    Incorrect:

    Not C: ViewData#39;s life only lasts during current http request.

    Not D: TempData is a bucket where you can dump data that is only needed for the following request. That is, anything you put into TempData is discarded after the next request completes.

    Question No: 87 DRAG DROP – (Topic 4)

    DRAG DROP

    You are developing an ASP.NET MVC application. You plan to use OAuth to authenticate users to the application.

    You need to use the correct authentication data in the application.

    What should you do? To answer, drag the appropriate data element to the correct location or locations. Each data 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.

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    Answer:

    Ensurepass 2018 PDF and VCE

    Explanation:

    Ensurepass 2018 PDF and VCE

    Live Connect implements the OAuth 2.0 protocol to authenticate users.

    In the authorization code grant flow, the client makes authorization requests by using request_type=code.

    The following diagram illustrates how the authorization code grant flow works.

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    1. The client starts the flow by directing the resource owner#39;s user agent to the Live Connect authorization endpoint, by using a URL in the following format.

      https://login.live.com/oauth20_authorize.srf?client_id=CLIENT_IDamp;scope=SCOPESamp;respo nse_type=codeamp;redirect_uri=REDIRECT_URI

    2. The authorization server authenticates the resource owner via the user agent, and establishes whether the resource owner grants or denies the client#39;s access request.

    3. Assuming that the resource owner has granted access, the Live Connect authorization server redirects the user agent to the client by using the redirection URI that was provided in the initial request.

    4. The user agent calls the client with the redirection URI, which includes an authorization code and any local state that was provided by the client. For example: http://contoso.com/Callback.htm?code=AUTHORIZATION_CODE.

    5. The client requests an access token from the authorization server#39;s token endpoint by using its client credentials for authentication, and includes the authorization code that was received in the previous step.

    6. If the credentials are valid, the authorization server responds by returning an access token.

      References: https://msdn.microsoft.com/en-us/library/hh243647.aspx

      Question No: 88 DRAG DROP – (Topic 4)

      You are developing an ASP.NET MVC application.

      You need to choose the appropriate Visual Studio templates to use for each test goal.

      Which Visual Studio Unit Test project templates should you use? To answer, drag the appropriate Unit Test project template to the correct test goal or test goals. Each project template 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.

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      Answer:

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      Explanation:

      Ensurepass 2018 PDF and VCE

      Box 1: Coded UI Test Project

      Automated tests that drive your application through its user interface (UI) are known as coded UI tests (CUITs). These tests include functional testing of the UI controls. They let you verify that the whole application, including its user interface, is functioning correctly. Coded UI Tests are particularly useful where there is validation or other logic in the user interface, for example in a web page. They are also frequently used to automate an existing manual test.

      Box 2: Unit Test Project

      Unit testing is a software testing method by which individual units of source code, sets of one or more computer program modules together with associated control data, usage procedures, and operating procedures, are tested to determine whether they are fit for use.[1] Intuitively, one can view a unit as the smallest testable part of an application.

      Box 3: Web Performance and Load Test Project Box 4: Web Performance and Load Test Project

      A load test is a container of Web performance tests and unit tests.

      A load test exposes many run-time properties that can be modified to generate the desired load simulation.

      References: https://msdn.microsoft.com/en-us/library/dd286726.aspx References: https://msdn.microsoft.com/en-us/library/ms182594(v=vs.110).aspx

      Question No: 89 DRAG DROP – (Topic 4)

      You develop an ASP.NET MVC application. You plan to implement ASP.NET SignalR for real-time push notifications. The application includes the following class:

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      You need to display the message.

      How should you complete the relevant code segment? To answer, drag the appropriate code segment to the correct location or locations. 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.

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      Answer:

      Ensurepass 2018 PDF and VCE

      Explanation:

      Ensurepass 2018 PDF and VCE

      Box 1: $.hubconnection(); Create a connection.

      Box 2: con.createHubProyxy(#39;MyHub#39;); Declare a proxy to reference the hub.

      Box 3: hub.start()(#39;function#39;, function(hello) { Start the connection

      References: https://www.asp.net/signalr/overview/getting-started/tutorial-getting-started- with-signalr

      Question No: 90 – (Topic 4)

      You are developing an ASP.NET MVC application that provides instant messaging capabilities to customers.

      You have the following requirements:

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      You need to design the application to meet the requirements. What should you do?

      1. Configure polling from the browser.

      2. Implement long-running HTTP requests.

      3. Implement WebSockets protocol on the client and the server.

      4. Instantiate a MessageChannel object on the client.

Answer: D

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