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

1. You are developing a Windows Store app to view MP4 videos.
You need to ensure that when a user double-clicks an MP4 file, the app starts and plays back the video automatically.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Add an OnFileActivated event handler to the App.xaml.cs file.
B) Add a File Type Associations declaration to the Appxmanifest file.
C) Add the Videos Library capability to the Appxmanifest file.
D) Add an AutoPlay Content declaration to the Appxmanifest file.
E) Modify the OnActivated event of the App.xaml.cs file to pass ProtocolActivatedEventArgs to the page if ActivatedEventArgs.Kind == ProtocolActivatedEventArgs.

2. 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:

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

A) Add a call to GetChannel in the OnLaunched event handler of the app.
B) Add a call to GetChannel in the OnActivated event handler of the app.
C) Set the Uri property of pushChannel in the OnActivated event handler of the app.
D) Set the Uri property of pushChannel in the OnLaunched event handler of the app.

3. DRAG DROP
You are developing a Windows Store app that uses the Windows Push Notification Service (WNS) to provide real-time updates to users. The app uses an HTTP request to authenticate a cloud service to interact with WNS.
The Package Security Identifier (SID) prefix is app://.
Parameter values must be URL encoded.
You need to ensure that the authentication request provides the required parameters.
Which parameters should you use? (To answer, drag the appropriate parameters to the correct location or locations. Each parameter 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.)

4. You are designing a Windows Store app that creates large amounts of temporary binary data each time it is run.
You need to ensure that data is persisted while the app is running but deleted when the app is closed.
Which app data storage mechanism should you use? (Each correct answer presents a complete solution. Choose all that apply.)

A) a roaming app data store
B) the app settings of the local app data store
C) the app files of the local app data store
D) a temporary app data store

5. HOTSPOT
You are developing a Windows Store app.
You configure the app to support AutoPlay when a portable media player is connected to a
Windows 8.1 device.
You need to verify whether the app was initiated from AutoPlay.
What code should you add to the OnActivated event handler? (To answer, select the
appropriate options in the answer area.)

Solutions: