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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) 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.

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

3. 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.)

4. DRAG DROP
You are developing a Windows Store app named App1.
You need to ensure that App1 meets the following requirements:
- Must be able to display a list of items in rows and columns.
- Must be able to display items one at a time.
What should you use for each requirement? (To answer, drag the appropriate elements to the correct requirements. Each element 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. DRAG DROP
You add a MediaElement named VideoTour and a button named playToButton to the
properties details page.
You need to ensure that video tours can be played to other devices.
You have the following code: (Line numbers are included for reference only.)

Which elements should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate elements to the correct targets in the answer area. Each element 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.)

Solutions: