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Exam Code: 70-486
Exam Name: Developing ASP.NET MVC 4 Web Applications
Certification Provider: Microsoft
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QUESTION 81
You updated the web.config file with the HTTP run-time value required to display an alternative version of the site.
You need to ensure that the correct page displays to the users.
Which code segment should you use to update the controller?
A. if (Request.IsTabletDevice)
B. if (Request.Browser.IsBrowser(“Mobile”))
C. if (Request.UserAgent[“Tablet”])
D. if (Request.Browser.IsMobileDevice)
Answer: D
QUESTION 82
The GetDealPrice method must be called by using Ajax.
You need to get the price of a product by using the GetDealPrice method of the ProductController.
Which code segment should you use? (Each correct answer presents a complete solution. Choose all that apply.)
A. Option A
B. Option B
C. Option C
D. Option D
Answer: CD
QUESTION 83
You need to implement client-side animations according to the business requirements.
Which line of code should you use? (Each correct answer presents a complete solution. Choose all that apply.)
A. $(“body h1:nth-child(1)”).fadeIn(1000);
B. $(“body h1:nth-child(1)”).fadeOut(1000);
C. $(“body h1:nth-child(1)”).animate({ opacity: 0 });
D. $(“body h1:nth-child(1)”).animate({ opacity: 1 });
Answer: BC
QUESTION 84
You need to implement client-side animations according to the business requirements.
Which line of code should you use? (Each correct answer presents a complete solution. Choose all that apply.)
A. $ (“h1: first”).animate ({ opacity: 0 });
B. $(“h1:first”).fadeIn(1000);
C. $(“h1:first”).animate({ opacity: 1 });
D. $(“h1:first”).fadeOut(1000);
Answer: AD
QUESTION 85
You need to configure session storage in the web.config file to meet the technical requirements for scalability.
Which SessionState mode should you use? (Each correct answer presents a complete solution. Choose all that apply.)
A. StateServer
B. InProc
C. AutoDetect
D. SqlServer
Answer: AD
QUESTION 86
You need to implement the mobile device support requirements.
How should you build the ProcessRequest method? (To answer, select the appropriate options in the answer area.)
Answer:
QUESTION 87
You need to update the routes to ensure that a product is always displayed on the product page.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Case Study 3 – Video Transcoding Service (QUESTION 88 – QUESTION 97)
For help on how to answer the questions, click the Instuctions button on the question screen.
Background
You are developing a video transcoding service.
This service is used by customers to upload video files, convert video to other formats, and view the converted files. This service is used by customers all over the world.
Business Requirements
– The user-facing portion of the application is an ASP.NET MVC application.
– It provides an interface for administrators to upload video and schedule transcoding.
– It also enables administrators and users to download the transcoded videos.
– When videos are uploaded, they are populated with metadata used to identify the video.
– The video metadata is gathered by only one system when the video upload is complete.
– Customers require support for Microsoft Internet Explorer 7 and later.
– The application contains a header that is visible on every page.
– If the logged-on user is an administrator, then the header will contain links to administrative functions. This information is read from a cookie that is set on the server.
– The administrative links must not be present if an error condition is present.
Technical Requirements
User Experience:
– The front-end web application enables a user to view a list of videos.
– The main view of the application is the web page that displays the list of videos.
– HTML elements other than the list of videos are changed with every request requiring the page to reload.
Compatibility:
– Some customers use browsers that do not support the HTTP DELETE verb.
– These browsers send a POST request with an HTTP header of X-Delete when the intended action is to delete.
Transcoding:
– The video transcoding occurs on a set of Windows Azure worker roles.
– The transcoding is performed by a third-party command line tool named transcode.exe. When the tool is installed, an Environment variable named transcode contains the path to the utility.
– A variable named license contains the license key. The license for the transcoding utility requires that it be unregistered when it is not in use.
– The transcoding utility requires a significant amount of resources. A maximum of 10 instances of the utility can be running at any one time. If an instance of the role cannot process an additional video, it must not prevent any other roles from processing that video.
– The utility logs errors to a Logs directory under the utilities path.
– A local Azure directory resource named perf is used to capture performance data.
Development:
– Developers must use Microsoft Remote Desktop Protocol (RDP) to view errors generated by the transcode.exe utility.
– An x509 certificate has been created and distributed to the developers for this purpose.
– Developers must be able to use only RDP and not any other administrative functions.
Application Structure
TranscodeWorkerRole.cs
ThumbnailGenerator.cs
VideoController.cs
DeleteHandler.cs
VideoAdminAttributes.cs
AdminVerifierFactory.cs
ImageConverter.cs
QUESTION 88
Customers download videos by using HTTP clients that support various content encodings.
You need to configure caching on the DownloadVideo action to maximize performance.
Which attribute should you add?
A. Option A
B. Option B
C. Option C
D. Option D
E. Option E
Answer: E
QUESTION 89
You need to ensure that all the MVC controllers are secure.
Which code segment should you use as the body for the CreateController method in AdminVerifierFactory.es?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
QUESTION 90
You are creating a new authentication system that uses an HTTP header value.
The existing authentication system must continue to operate normally.
You need to implement the custom authentication.
What should you do? (Each correct answer presents a complete solution. Choose all that apply.)
A. Create a class derived from ActionResult and check for a valid HTTP header value in the
ExecuteResult method.
Change all actions to return this new class.
B. Create an HttpHandler to check for a valid HTTP header value in the ProcessRequest method.
C. Create an HttpModule and check for a valid HTTP header value in the AuthenticateRequest event.
D. Create a class derived from AuthorizeAttribute and check for a valid HTTP header value in the
AuthorizeCore method.
Change usages of the existing AuthorizeAttribute to use the new class.
Answer: CD
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