Online Access Free 070-491 Practice Test

You are developing a Windows Store app.
The app contains a page named MainPage. The page contains a media element named videoPlayer and a button named btnPlayTo. You need to provide users with the ability to select a device that will display the contents of
videoPlayer when they click btnPlayTo.
Which code segment should you add to the Click event handler of btnPlayTo?

• A.Option D
• B.Option C
• C.Option A
• D.Option B

HOTSPOT
You are developing a Windows Store app that allows users to copy music from their local computers to removable storage.
The app displays songs grouped by the month the song was downloaded and allows individual songs to be copied to the removable storage device. The user interface for selecting and copying songs uses data binding.
You need to load and return songs in a format appropriate for data binding.
How should you complete the code segment? (To answer, select the appropriate line of code from each drop-down list in the answer area.)

Correct Answer:

You need to track the screen orientation and page size. Which code segment should you insert at line CS09?

• A.Option D
• B.Option C
• C.Option A
• D.Option B

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.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.set the ReportInterval property of the Compass object to 0.

You are developing a Windows Store app.
You declare a Search declaration in the app manifest and you add a search results page.
You plan to display search results by using a Query Text property that derives from EventArgs,
You need to ensure that users can use the Search charm to search for content within the app.
What should you do?

• A.Add an event handler for the SearchPane.QueryChanged event to MainPage.xaml.es. Register the event handler in the OnWindowCreated method in MainPage.xaml.es.
• B.Add an event handler for the SearchPane.QuerySubmitted event to App.xaml.cs. Register the event handler in the constructor of the page.
• C.Add an event handler for the SearchPane.QuerySubmitted event to App.xaml.cs. Register the event handler in the OnWindowCreated method of the page.
• D.Add an event handler for the SearchPane.QuerySubmitted event to MainPage.xaml.es. Register the event handler in the OnWindowCreated method in MainPage.xaml.es.