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Advanced Windows Store App Development using C#

Question No: 21 – (Topic 2)

You need to set the PlayTo source in the LoadFile() method. Which line of code should you insert at line PT30?

  1. element.SetSource(videoFile, contentType);

  2. playToManager.SetSource(stream, contentType);

  3. dispatcher.SetSource(stream, contentType);

  4. element.SetSource(stream, contentType);

Answer: D

Question No: 22 – (Topic 2)

The users need the ambient light readings at the time a goose sighting is made.

You need to set up the light-sensing device.

Which code segment should you add to the LoadSensors() method of the Environment class?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: D

Question No: 23 – (Topic 2)

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?

  1. Remove the Compass initialization from the LoadSensors() method and initialize it within the GetLocationAsync() method.

  2. set the ReportInterval property of the Compass object to 16.

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

  4. Move the locator variable to a class level variable and initialize it in the Environment constructor.

Answer: D

Question No: 24 – (Topic 2)

You place a breakpoint at line MP31 in the app.

When you debug the app, the debugger continuously catches a System.UnauthorizedAccess exception.

You need to resolve the exception. What should you do?

  1. Wrap lines CE43 through CE46 in a try-catch statement.

  2. At line MP10, change the code segment to the following line of code. read if(cameraUI != null)

  3. Move line CE09 to CE16.

  4. At line PA25, insert the following line of code.

lt;Capability Name=quot;picturesLibraryquot;/gt;

Answer: D

Question No: 25 – (Topic 2)

You need to modify the code at line CE38 to meet the requirements. Which interface should you use for the return type of the method?\

  1. IMap

  2. IVector

  3. IVectorView

  4. IList

Answer: B

Question No: 26 – (Topic 2)

You need to register the reusable WinMD component. What should you do?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: A

Question No: 27 – (Topic 2)

You need to reference the reusable WinMD project. What should you do?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: C

Question No: 28 – (Topic 2)

You need to modify the GetWeatherData() method in the WinMD component at line CE38. Which interface should you use for the return type of the method?

  1. IVectorView

  2. IVector

  3. IList

  4. IMap

Answer: A

Question No: 29 – (Topic 2)

You need to ascertain whether the device that the app is running on has a compass.

Which line of code should you insert at line CE43?

  1. while(Windows.Devices.Sensors == Compass)

  2. if (Compass.GetDefault() != null)

  3. if (Compass.GetDefault() == Compass.FirstOrDefault)

  4. if(Compass.GetCurrentReading() != null)

Answer: B

Question No: 30 – (Topic 2)

You need to modify the existing GetCurrentEnvironmentAsync() method in the Environment WinMD component to accept parameters.

Which type should you use at line CE07?

  1. Dynamic

  2. Listlt;stringgt;

  3. Tasklt;EnvironmentalStatusgt;

  4. IListlt;stringgt;

Answer: D

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