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Microsoft Recertification for MCSD: Windows Store Apps using C# Sample Questions:

1. You are developing a Windows Store app.
The app will access several web resources that use an OAuth 2.0 authentication provider.
You need to recommend in which class to store user credentials so that users do not have
to reenter their credentials when they access the web resources.
Which class should you recommend?

A) Windows.Security.Credentials.PasswordVault
B) Windows.Security.Credentials.WebAccount
C) System.Net.AuthenticationManager
D) System.Net.NetworkCredential

2. You are developing a Windows Store app.
The app contains a page named MainPage. The page contains a media element named videoPlayer and a button named btnPlayTo. You need to provide users with the ability to select a device that will display the contents of
videoPlayer when they click btnPlayTo.
Which code segment should you add to the Click event handler of btnPlayTo?

A) Option D
B) Option B
C) Option C
D) Option A

3. HOTSPOT
You are developing a Windows Store app.
The app receives badge notifications from Windows Push Notification Services (WNS).
You configure the app to establish a communication channel with WNS. You use a variable named pushChannel to store the notification channel object used for communication. You add the following line of code to the app:

Which code snippets should you insert in Target 1, Target 2 and Target 3 to complete the code? (To answer, select the correct code snippet from each drop-down list in the answer area.)

4. DRAG DROP
You are developing a Windows Store app.
The app has the following requirements:
- Open the Search charm.
- Provide query suggestions by using the GetSuggestions() method-
You need to ensure that the app meets the requirements. You have the following code:

Which code snippets should you insert in Target 1 and Target 2 to complete the code? (To answer, drag the appropriate code snippets to the correct targets in the answer area. Each code snippet 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.)

5. You are developing a Windows Store app named VideoPlayer.
The app will provide user with the ability to select video files by using the file picker and to play the video.
You need to recommend a solution for the app that meets the following requirements:
- If the app is terminated while playing a video, the next time the app starts, the
video must play.
- The app must minimize the amount of storage space used.
- The app must NOT request any capabilities.
What should you include in the recommendation?

A) Store the video in ApplicationData.Current.LocalFolder.
B) Store the StorageFile.Path property in ApplicationData.Current.LocalSettings.
C) Store the video in ApplicationData.Current.RoamingFolder.
D) Add the file to AccessCache.StorageApplicationPermissions.MostRecentlyUsedList.

Solutions: