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Microsoft 070-491 Exam Syllabus Topics:

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

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

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

3. DRAG DROP
You are developing an augmented reality app.
You need to retrieve the direction to which the device points.
You have the following code:

Which code snippets should you include in Target 1, Target 2 and Target 3 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.)

4. DRAG DROP
You are developing a Windows Store app.
You need to ensure that the app meets the following requirements:
- When the app is started, the app bar must appear at the top of the app. - When the app is resized, if the new width of the app is less than 400 pixels, the app bar must be hidden. Users must be able to show the app bar by right-clicking.
- When the app is resized, if the new width is greater than 400 pixels, the app bar must be visible. Users must be able to hide the app bar by right-clicking, pressing Windows + Z, or swiping in from the top edge of the screen.
You have the following XAML markup in a file named MainPage.xaml. (Line numbers are included for reference only.)

You have the following code in a file named MainPage.xaml.es. {Line numbers are included for reference only.)

Which code segments should you insert in MainPage.xaml and MainPage.xaml.cs? (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.)

5. HOTSPOT
You are developing a Windows Store app.
You define an app bar named BottomAppBar.
You need to ensure that you can open the app bar programmatically.
You have the following code:

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

Solutions: