Topic 3, Scenario 3
Background
You are developing a service that allows for the direct digital-to-digital data conversion of one
encoding to another. Users currently employs the service for the uploading of audiovisual media
files for conversion to different formats, as well as for the viewing of the converted files.
Business Requirements
The client-side section of the application has been created as an ASP.NET MVC application using
Visual Studio 2012. The client-side of the application allows for the uploading of audiovisual media
and the planning of transcoding by administrators. Furthermore, administrators and users are
allowed to download the audiovisual medias that have gone through the direct digital-to-digital
data conversion process.
Metadata is attached to uploaded audiovisual medias for identification purposes. As soon as the
audiovisual media upload is complete, this metadata is collected by a single system.
User computers must have Microsoft Internet Explorer 7 installed, as a minimum.
The application excludes a header that can be viewed on all pages. The header has been
configured to display links to administrative functions for users logged in as administrators. A
cookie, which is configured on the server, supplies this data. In the event of an error condition
existing, the administrative links should not be displayed.
Technical Requirements
User Experience:
Users are able to scrutinize a list of audiovisual medias via the front-end web application. The
presented page is configured as the application’s principal view. Every request causes the HTML
elements, other than the list of audiovisual medias, to change. This, in turn, causes the page to
reload.
Compatibility:
Some user browsers, which do not support the HTTP DELETE verb, sends a POST request with
an HTTP header of X-Delete when the expected operation is to delete.
Transcoding:
A set of Windows Azure worker roles has been configured for transcoding purposes. A third-party
command line tool must be installed for transcoding. The path to the utility is hosted by an
Environment variable, subsequent to tool installation. The license key is included in a variable,
named license. When the utility is not in use, it has to be unregistered. Furthermore, a substantial
quantity of resources is consumed by the utility.
At any given time, the utility can have ten instances of the utility running, at most. An instance of
the role must allow other roles to process the additional audiovisual media that it cannot.
Errors are logged to a Logs directory under the utilities path by the utility.
Performance information is collected by a local Azure directory resource, named perf.
Development:
Errors generated by the utility must be examined by developers via Microsoft Remote Desktop
Protocol (RDP). This functionality has been provided by the creation of an x509 certificate that has
been distributed to the developers. Only RDP must be used by developers for this function.
**********************************
You are instructed to make sure that the deletion of audiovisual media is not dependent on
browser ability.
Which of the following actions should you take?
A.
You should consider writing code to create a SendSync method.
B.
You should consider writing code to create a SendAsync method.
C.
You should consider writing code to create a RetrieveAsync method.
D.
You should consider writing code to create a RetrieveSync method.
Why an Asynchronous method?
Doesn’t asynchronous methods depend more on browser support than writing synchronous ones?
Cuando tu haces un metodo SendAsync lo que hace es ejecutarse por background en pocas palabras de manera asincrona sin afectar el proceso actual del browser ejecutando por un subproceso, y permitir que el procesos principal siga ejecutandose
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New 70-486 Exam Questions (3/May/2017 Updated):
NEW QUESTION 193
You are building an ASP.NET web application. You must test the web application in multiple browsers at the same time. You need to ensure that the application can use the Browser Link feature. Which two actions should you perform? Each correct answer presents part of the solution.
A. In the web.config file, set the value of the debug attribute to False.
B. In the web.config file, set the value of the debug attribute to True.
C. Enable Browser link.
D. Use an external editor for webpages.
E. Enable source control server support.
Answer: BC
Explanation:
Debugging must be enabled in the web.config file. To enable Browser Link, set debug=true in the element in the project’s Web.config file.
NEW QUESTION 200
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?
A. Thread.CurrentPrincipal.Identity;
B. ((IClaimsPrincipal)Thread.CurrentPrincipal).Identities[0].Claims;
C. Thread.CurrentPrincipal;
D. ((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)
{
}
}
NEW QUESTION 201
You are developing an ASP.NET MVC application. The application has a contact view includes a form for editing the displayed contact. You need to save the Contact object model when the form is posted back to the EditContact method using a POST method request. Which code segment should you use? (Each correct answer presents a complete solution. Choose all that apply.)
A. public ActionResult EditContact(){var c = newContact(){FirstName = Request.QueryString [‘”FirstName”‘],LastName = Request.QueryString[“LastName”]},SaveContact(c);return View(c);}
B. public ActionResult EditContact(Contact c){SaveContact(c);return View(c);}
C. public ActionResult EditContact(FormCollection values){var c = newContact(){FirstName = values [‘”FirstName”‘],LastName = values[“LastName”]},SaveContact(c);return View(c);}
D. public ActionResult EditContact(QueryStringProvider values){var c = newContact(){FirstName = values.GetValue[‘”FirstName”‘],LastName = values.GetValue [“LastName”]},SaveContact(c);return View (c);}
Answer: AB
NEW QUESTION 203
You are developing an ASP.NET MVC application. The application uses a set of custom exceptions to log errors that occur during the execution of an action. You need to develop a class that implements logging. Which interface should you implement?
A. IExceptionFilter
B. IActionFilter
C. IClientValidatable
D. IResultFilter
Answer: A
Explanation:
Exception filters are used to apply global policies to unhandled exceptions in the MVC app. Exception Filters implement either the IExceptionFilter or IAsyncExceptionFilter interface. Exception filters handle unhandled exceptions, including those that occur during controller creation and model binding. They are only called when an exception occurs in the pipeline.
NEW QUESTION 204
You create an ASP.NET MVC application. You host the application by using the Open Web Interface for .NET (OWIN).
You run the following command by using the NuGet Package Manager console:
install-package Microsoft.AspNet.SignalR
You plan to implement real-time push notifications from the server using ASP.NET SignalR. You need to complete the ASP.NET SignalR implementation. Which three steps should you perform? Each correct answer presents part of the solution.
A. Create a hub class to push content to clients.
B. Create a class that derives from the PersistentConnection class. Use the derived class to push content to clients.
C. Use the SignalR jQuery library in a web page to send messages to the hub and display updates from the hub.
D. Map a SignalR hub to the app builder pipeline by using an OWIN startup class.
E. Start the SignalR hub asynchronously and respond to the appropriate callback methods.
Answer: ACD
Explanation:
A:
In Solution Explorer, right-click the project, select Add | New Folder, and add a new folder named Hubs. Right-click the Hubs folder, click Add | New Item, select the Visual C# | Web | SignalR node in the Installed pane, select SignalR Hub Class (v2) from the center pane, and create a new hub named ChatHub.cs. You will use this class as a SignalR server hub that sends messages to all clients.
C:
Use the SignalR jQuery library in a web page to send messages and display updates from the hub.
D:
Create an OWIN startup class to configure the application.
NEW QUESTION 205
You are developing an ASP.NET MVC application. Devices that use many different browsers will use the application. You have the following requirements:
– Content must display correctly when a device is in landscape or portrait orientation.
– Content must not scale when the device orientation changes.
– Content must be displayed by using the maximum available screen space.
– The application must render properly in Internet Explorer 8 or later versions.
You need to configure the application. Which two actions should you perform? Each correct answer presents part of the solution.
A. Use JavaScript to evaluate the window.innerWidth and window.innerHeigh properties.
B. Set the value of the width property for the viewport meta tag to device-width.
C. Use CSS to target the HTML element on each page. Set the values of the width and height properties to 100%.
D. Use CSS media queries to target screen size, device orientation, and other browser capabilities.
Answer: BD
Explanation:
B:
If you want the viewport width to match the device’s physical pixels, you can specify the following:
For this to work correctly, you must not explicitly force elements to exceed that width (e.g., using a width attribute or CSS property), otherwise the browser will be forced to use a larger viewport regardless.
D:
Media queries in CSS3 extend the CSS2 media types idea: Instead of looking for a type of device, they look at the capability of the device. Media queries can be used to check many things, such as:
– width and height of the viewport
– width and height of the device
– orientation (is the tablet/phone in landscape or portrait mode) resolution
Using media queries are a popular technique for delivering a tailored style sheet to tablets, iPhone, and Androids.
References:
NEW QUESTION 206
……
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