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Advanced Windows Store App Development using C#

Question No: 41 – (Topic 3)

You need to protect the metadata for the secure documents.

Which protection descriptor should you use for the DataProtectionProvider object?

  1. SID

  2. WEBCREDENTIALS=userrpassword

  3. LOCAL=user

  4. USER=current

Answer: C

Question No: 42 – (Topic 3)

Exceptions occur when the WriteAuditAsync() method of the Auditor object is run. The UI must remain responsive to user actions.

You need to handle the exceptions. Which code segment should you use?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: A

Question No: 43 – (Topic 3)

You need to set the default print options according to the requirements.

Which lines of code should you use at line PG33? (Each correct answer presents part of the solution. Choose all that apply.)

  1. printTask.Options.Orientation = a PrintOrientation.Portrait;

  2. printTask.Options.Orientation = Print.Default = Portrait;

  3. printTask.Options.MediaSize = Print.Default = MediaSize.Legal;

  4. printTask.Options.ColorMode = Print.ColorDefault = Grayscale;

  5. printTask.Options.ColorMode = PrintColorMode. Grayscale;

  6. printTask.Options.MediaSize = PrintMediaSize.Letter;

Answer: A,E

Explanation: A: PrintOrientation enumeration Specifies the orientation options for the printed output

Portrait | portrait (value 3), The Portrait orientation option.

E: We can also choose what we feel the default setting should be. Maybe we really wanted the Color Mode to be set to grayscale rather than color.

printTask.options.colorMode = _printing.PrintColorMode.graysc From scenario:

Printing:

The default printing options are portrait orientation and grayscale color mode. The app must enable the user to select the media size and printing orientation.

Question No: 44 – (Topic 3)

You need to deactivate features of the app when it runs as a trial.

Which lines of code should you use for the production app? (Each correct answer presents part of the solution. Choose all that apply.)

  1. licenseInforination.LicenseChanged = new LicenseChangedEventHandler (modifyLicense)

  2. license.LicenseChanged = new LicenseChangedEventHandler(implementLicense)

  3. licenseInformation = CurrentApp.GetCurrentLicense()

  4. licenseInforrcation = CurrentApp.Licenselnformation

  5. license = CurrentApp.GetCurrentLicense()

  6. licenselnformation.LicenseChanged = new LicenseChangedEventHandler (implementLicense)

Answer: B,D

Explanation: B: // Register for the license state change event. licenseInformation.addEventListener(quot;licensechangedquot;, reloadLicense);

D: Initialize the CurrentApp or CurrentAppSimulator to access the app#39;s license info.

Example:

// Get the license info

licenseInformation = currentApp.licenseInformation;

* From scenario:

/ The app must provide trial functionality that will expire after 14 days. If the app expires while it is running, the app must display an expiration message to the user and prompt the user to purchase the app.

Question No: 45 DRAG DROP – (Topic 3)

You need to call the DoWork() method asynchronously in a background task.

Which four lines of code should you use to create the Run() method on line SP13? (To answer, move the appropriate lines of code from the list of code segments to the answer area and arrange them in the correct order.)

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Answer:

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Explanation:

Box 1:

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Box 2:

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Box 3:

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Box 4:

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Note:

  • IBackgroundTaskInstance.GetDeferral method

    Informs the system that the background task might continue to perform work after the IBackgroundTask.Run method returns.

  • Example:

public async void Run(IBackgroundTaskInstance taskInstance)

{

Debug.WriteLine(quot;Start background download in background task!!!quot;);

// Associate a cancellation handler with the background task.

//taskInstance.Canceled = new BackgroundTaskCanceledEventHandler(OnCanceled);

// Get the deferral object from the task instance, and take a reference to the taskInstance;

_deferral = taskInstance.GetDeferral();

//m_BKDownload.ResumeAll();

// Check if file already downloaded

string inputuri = quot;http://www.johnhaydon.com/wp- content/uploads/2011/07/google_plus_logo.jpgquot;;

string FileName = inputuri.Split(new[] { #39;/#39; }).LastOrDefault(); bool b_fileFounded = false;

IReadOnlyListlt;StorageFilegt; outputFiles = await KnownFolders.PicturesLibrary.GetFilesAsync();

foreach (var file in outputFiles)

{

if (file.Name == FileName)

{

b_fileFounded = true;

}

}

if (b_fileFounded == false)

{

Debug.WriteLine(quot;downloading {0} in the background taskquot;, FileName);

StorageFile destinationFile = await KnownFolders.PicturesLibrary.CreateFileAsync( FileName, CreationCollisionOption.GenerateUniqueName);

var downloadOperation = m_BKDownload.CreateDownload(new Uri(inputuri), destinationFile);

await downloadOperation.StartAsync().AsTask();

}

_deferral.Complete();

}

Question No: 46 – (Topic 3)

You need to enable the capabilities that allow communication according to the technical requirements.

Which capabilities should you enable? (Each correct answer presents part of the solution. Choose all that apply.)

  1. Shared User Certificates

  2. SSL Certificates

  3. Internet (Client)

  4. Default Windows Credentials

Answer: B,C

Explanation: B: From scenario:

Communication between the app and e-book vendors must occur over an encrypted communication channel.

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Communication must use certificates to enable the SSL connection. C:

Topic 4, Fabrikam, Inc Overview

Fabrikam, Inc. is a realtor in the United States.

Fabrikam grants its customers access to a web site, where they can search for houses for rent and for sale. Its customers can enter basic requirements, such as location, number of rooms, dimensions, and a price range. The web site displays a list of houses that meet the customers#39; criteria. The customers can then view more details about each house and can add a listing to a favorites list.

Requirements Business Goals

Fabrikam plans to provide a more interactive experience for its customers. Fabrikam is creating a video tour for each listing. The video tours can be used to visit the property virtually.

Fabrikam plans to create a Windows Store app on Windows 8.1 RT and Windows 8.1 Pro devices.

General Requirements

Fabrikam identifies the following general requirements for the app:

->The app interface must be available in English, Spanish, and French.

->The app must provide the customers with the ability to perform searches the same way that the current web site does.

->It is expected that the customers will view more than 3,000 pictures annually. The main page of the app must show a list of the last 10 pictures that were viewed.

->If pictures are added to a listing that is in a customer#39;s favorites list, the pictures must be downloaded automatically from Windows Azure. This must occur if the app is suspended or not running.

Printing Requirements

Customers must be able to print the details of a listing from the details page by clicking a button within the app.

You plan to add the following XAML markup to the listing details page:

lt;Button x:Name=quot;btnPrint Content=quot;Printquot; Click=quot;InvoJcePrintquot; /gt;.

Video Tour Requirements

Fabrikam identifies the following requirements for the video tours:

->Customers must be able to play the video tour on a different device by using a

button within the app.

->When a customer clicks the details of a listing, the app must start downloading the video tour in the background.

->When the app starts, the app must verify whether there are any pending downloads, and resume any paused downloads.

->The last five viewed video tours that are not on the customer#39;s favorites list must be cached for subsequent viewing.

->Customers must be able to download all of the video tours for the properties that they added to their favorites list.

->The property details page must contain a MediaElement control that will be used to play the video tour of the property.

->When downloading the video tours, the app must remain responsive, and each download must be processed on a separate thread.

Package.appxmanifest

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Question No: 47 – (Topic 4)

You create the following method in a Utility class: (Line numbers are included for reference only.)

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You need to complete the code to meet the requirement for displaying the last 10 viewed pictures.

What code should you add to line 04? (More than one answer choice may achieve the goal. Select the BEST answer.)

  1. StorageApplicationPermissions.FutureAccessList.Add(file, file.Name);

  2. StorageApplicationPermissions.MostlyRecentlyUsedl_ist.Add(file, file.Name);

  3. StorageItemMostRecentlyUsedList.Entries.Add(file, file.Name);

  4. StorageItemAccessList.Entries.Add(file, file.Name);

Answer: A

Question No: 48 – (Topic 4)

You create a mobile service to send push notifications to the app.

You configure the service and the app to work with Windows Push Notification Services (WNS).

You add the following code to the App.xaml.cs file:

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You need to ensure that the app can access the push notification channel. What should you do first?

  1. Add a call to GetChannel in the OnLaunched event handler of the app.

  2. Set the Uri property of pushChannel in the OnActivated event handler of the app.

  3. Set the Uri property of pushChannel in the OnLaunched event handler of the app.

  4. Add a call to GetChannel in the OnActivated event handler of the app.

Answer: A

Question No: 49 HOTSPOT – (Topic 4)

You need to verify whether the app conforms to the Windows Store requirements.

What command should you run? (To answer, select the appropriate options in the answer area.)

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Dumps4Cert 2018 PDF and VCE

Answer:

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Question No: 50 – (Topic 4)

You need to recommend a solution to comply with the language requirements of the app. What should you include in the recommendation? (Each correct answer presents part of

the solution. Choose three.)

  1. Use the ResourceLoader class to retrieve localized strings from the code.

  2. In a subfolder of the app, create three .config files.

  3. Use the ResourceManager class to retrieve localized strings from the code.

  4. Use the x:Uid property for all of the controls that require localization.

  5. Use the x:id property for all of the controls that require localization.

  6. In a subfolder of the app, create three .resw files.

Answer: A,D,F

Explanation: From scenario: The app interface must be available in English, Spanish, and French.

A (not C): You can load string resources from objects such as resource files, libraries, controls, and Windows Store app packages and manifests.

* Example: var res = Windows.ApplicationModel.ResourceLoader(#39;Errors#39;); res.GetString(#39;AlreadyRegistered#39;);

D (not E): x:Uid directive

Provides a unique identifier for markup elements. For Windows Runtime XAML, this unique identifier is used by XAML localization processes and tools, such as using resources from a

.resw resource file.

F (not B): Windows Store apps that use XAML

For Windows Store apps that use XAML, you localize these fields in resources.resw files by using the Resource Editor. To create the United States English version of the manifest fields, you would add an en-us\resources.resw file.

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