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

1. 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.)

2. You are developing a Windows Store app that will provide users with the ability to save annotations to text files.
You have the following code segment: (Line numbers are included for reference only.)

You need to add the contents of data to the beginning of file. Which code segment should you insert at line 03?

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

3. Users report performance issues when getting the location information associated with a photo. You suspect the app is encountering performance issues in the GetLocationAsync() method of the Environment class.
You need to enhance the performance of the GetLocationAsync() method of the app.
What should you do?

A) set the ReportInterval property of the Compass object to 0.
B) Remove the Compass initialization from the LoadSensors() method and initialize it within the GetLocationAsync() method.
C) set the ReportInterval property of the Compass object to 16.
D) Move the locator variable to a class level variable and initialize it in the Environment constructor.

4. 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 E
B) Option D
C) Option C
D) Option A
E) Option B

5. You are developing a Windows Store app.
The app will access a web service.
You need to declare the web service Uniform Resource Identifier (URI).
Which file should you modify?

A) xap
B) Wsp
C) WebConfig
D) AppConfig
E) AppxManifest

Solutions: