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

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

2. DRAG DROP
You need to meet the app caching requirements.
Which caching technique should you use in each scenario? (To answer, drag the appropriate technique to the correct scenario. Each technique 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.)

3. You are developing a Windows Store app that allows users to record audio and video files and save them to their devices.
You have the following requirements:
The audio and video files must be shorter than three minutes in duration. The app must finalize recording automatically when the time limit is reached. You cannot use continuous polling to test when the time limit is reached.
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You need to ensure that the app meets the requirements.
What should you do?

A) Assign a handler lo the DefaultAudioCaptureDeviceChanged event.
B) Call the StopRecordAsyncO method.
C) Handle the RecordLimitationExceeded event.
D) Handle the AudioTransferRequested event.

4. 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) Move the locator variable to a class level variable and initialize it in the Environment constructor.
D) set the ReportInterval property of the Compass object to 16.

5. You are developing a Windows Store app that accesses a USB Human Interface Device (HID). The app has a default page and a settings page.
You need to ensure that when a user connects the USB device, the app starts automatically and opens the settings page.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Add a Removable Storage capability to the app manifest.
B) Override the OnActivated method in the Application class and use the ActivatedEventArgs interface.
C) Add an AutoPlay Device declaration to the app manifest.
D) Add a File Type Associations declaration to the app manifest.
E) Override the OnLaunched method in the Application class and use the ApplicationViewEventArgs interface.

Solutions: