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

1. DRAG DROP
You are developing a page for a Windows Store app.
You have the following requirements for the page:
- Display a button on the bottom app bar that allows the user to insert a picture. This button must be bound to the Insert command in the view model. - Display a button in the main content area of the page that allows the user to open documents. This button must be bound to the Open command in the view model.
You need to ensure that the requirements are met.
How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment 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.)

2. DRAG DROP
You are developing a Windows Store social media app. The app communicates with the
server by using a secure web service.
You need to ensure that users can securely store and retrieve web service credentials.
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.)

3. You are developing a Windows Store app named GeoLoc. You have the following code:

When you run the app on some devices, you receive the following error message: "An exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll but was not handled in user code."
You need to resolve the issue that causes the exception to occur.
Which file should you modify?

A) App.xaml
B) Geoloc.csproj
C) Assemblyinfo.es
D) Package.appxmanifest

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

5. You are developing a Windows Store app.
The app contains a page named MainPage. The page contains a media element named videoPlayer.
You need to provide users with the ability to play the contents of videoPlayer on different devices by using the Devices charm.
Which two code segments should you add to the OnNavigateTo event handler on MainPage? (Each correct answer presents part of the solution. Choose two.)

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

Solutions: