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Following questions and answers are all new published by Microsoft Official Exam Center: http://www.lead2pass.com/70-357.html
Case Study: 1 – Fabrikam
Case Study: 2 – LitWare, Inc.
Case Study: 3 – Timeline
QUESTION 1
You are developing a Universal Windows Platform (UWP) app.
Your app stores files on a user’s device.
You need to be able to replace the existing files with new files generated by the user.
Solution: You run the StoragaFile.GetParentAsync method to get a reference to the existing file. Then, you run the StorageFile.CreateStreamedFileAsyne method to create the- new file at that same location.
Does this meet the goal?
A. yes
B. No
Answer: A
QUESTION 2
You are developing a Universal Windows Platform (UWP) app.
Your app stores files on a user’s device.
You need to be able to replace the existing files with new files generated by the user.
Solution: You run the StorageFile. OpenSequentialReadAsync method to replace the existing file.
Does this meet the goal?
A. yes
B. No
Answer: B
QUESTION 3
You have two Universal Window Platform (UWP) apps named Catalog and Research, respectively.
You need to create a service in the Catalog app that can be queried by the Research app.
Which three tasks should you perform? Each correct answer presents part of the solution.
A. Enter the package family name of the Catalog app in the Research app.
B. Add an app service extension to package.appmanifest file in the Research app
C. Add an app service extension to package.appmanifest file the the Catalog app.
D. Enter the package family name of the Catalog app In the Catalog app.
E. Add a Windows Runtime component to the Research app.
F. Add a Windows Runtime component to the Catalog app.
Answer: ABE
QUESTION 4
You have a Universal Windows Platform (UWPJ app. The app has a page that includes the following XAML markup. Line numbers are included for reference only.
Users report that the page takes a long time to refresh.
You need to improve the load time for the page while maintaining the same layout and functionality.
What should you do?
A. Specify exact values for the Width property in lines 05 and 06.
B. Move the attributes from the BORDER element at line 02 to the GRID element at line 03. Then, remove the BORDER elements at line 02 and line 11.
C. Move the Fill and Opacity attributes and value from the RFCTANGLE dement at line 08 to the GRID element at line 03 Then. Remove the RECTANGLE element at line 08 to the GRID. Then, Remove the RECTANGLE element.
D. Swap the markup at line 012 with the markup at line 03. Swap the markup at line 10 with the markup at line 11.
Answer: C
QUESTION 5
You have to connect your app to an online identity provider that uses OAuth authentication protocol.
The app must securely use the Web Authentication Broker object for authentication.
You need to ensure that the app registers with the provider.
Which two actions should you perform? Each correct answer presents part of the solution.
A. Call the GetCurrcntApplicotionCallbackUri method.
B. Construct a HTTPS request URI.
C. Call the Authenticate Async method.
D. Construct a HTTP request URI.
Answer: A
QUESTION 6
You are developing a Universal Windows Platform (UWP} a pp. The app must be available on Windows Phone, Windows tablet devices, and Xbox. When the app is running on a device, you need to determine which members of a specific class you can use.
Which of the following methods should you use?
A. Selector.GetlsSelectionActive
B. Userlnformation.NameAccessAllowed
C. Apilnformation.lsPropertyPresent
D. Storyboard.GetTargetName
Answer: D
QUESTION 7
You are developing a Universal Windows Platform (UWP) app that allows users to lake photos and record videos. The photos and videos must be stored in the user’s Photos library and Videos library, respectively. The app must not display a user interface for saving files.
You need to configure the app.
Which set of capabilities should you declare in the app manifest?
A. webcam, location, proximity and Pictures library
B. webcam, microphone, Pictures library and Video library
C. Internet (client), microphone, location and proximity
D. Internet (client), Documents library, Videos library, and proximity
Answer: A
QUESTION 8
You are a developing a Universal Windows Platform (UWP) app.
You need to provide a solution that moves the scroll bars of the ScrollViewer when a user rotates the mouse wheel.
Which two actions should you perform? Each correct answer presents part of the solution.
A. Add an event handler to the PointerWheelChanged event for the current window.
B. Evaluate the CurrentPoint.Properties.lsHorizontalMouseWheel property of the PointerEventArgs object. Call the ChangeView() method of the ScrollViewer.
C. Evaluate the CurrentPoint.Properties.MouseWhcclDelta property of the PointerEventArgs object. Call the Change View() method of the ScrollViewer.
D. Update the XAML of the ScrollViewer to include the PointerWheelChanged event with a new event handler. Evaluate the Pointer.lslnRange property of the PointerRoutedEventArgs object within the event handler. Call the ChnageView() method of the ScrollViewer.
E. Add an event handler to the PointerRoutedAway event for the current window.
Answer: DE
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