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Microsoft Advanced Windows Store App Development using C# Sample Questions:

1. DRAG DROP
You are developing a Windows Store app that uploads large files to the Internet by using background tasks.
uploadTask is an instance of the IBackgroundTask interface that provides access to a background task instance. UploadFilesAsync() is the asynchronous method that performs the upload.
You need to ensure that the app performs the upload operation asynchronously in a background task.
Which three actions should you perform in sequence? (To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.)

2. HOTSPOT
You are developing a Windows Store app.
The app will use certificates issued by a standalone certification authority (CA) for authentication. The standalone CA certificate is stored in a file named Ca.cer. You need to configure the app manifest to ensure that the app can use certificates issued
by the standalone CA.
You have the following XAML markup in the app manifest:

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

3. HOTSPOT
You are developing a Windows Store app that displays and prints information. You have the following code.

You need to enable printing.
How should you complete the initialization of the print functionality? (To answer, select the appropriate element from the drop-down list in the answer area.)

4. You are developing a Windows Store app for devices connected to AC power.
The app must meet the following requirements:
- The app must download movie reviews from a web service once per hour. - The app must have new movie reviews ready for the user when the user interacts with the app. - The app cannot interact with the lock screen.
You need to ensure that the web service is called periodically whether the app is running or suspended.
What should you do?

A) Implement the IBackgroundTask interface to make the service call and then register a PushNotificationTrigger object to run the background task when the new reviews are available.
B) Implement the IBackgroundTask interface to make the service call and then register a MaintenanceTrigger object to run the background task every hour.
C) Use the ThreadPoolTimer.CreatePeriodicTimer() static method to periodically call the web service to get new movie reviews for display.
D) Implement the IBackgroundTask interface to make the service call and then register a TimeTrigger object to run the background task every hour.

5. You are preparing to deploy a Windows Store app to the marketplace.
You need to ensure that unhandled errors and exceptions are never displayed to users.
What should you do?

A) Write a handler for the UnhandledException event and set the Handled property on the UnhandledExceptionEventArgs object to true.
B) Open the Exceptions window in Visual Studio and clear the check box for unhandled exceptions for the Common Language Runtime.
C) Write a handler for the UnhandledException event and set the CancelBubble property on the UnhandledExceptionEventArgs object to true.
D) In the app object, wrap the call to the Window.Current.Activate() method in a try-catch statement to handle any exceptions that occur.

Solutions: