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Exam Code: 70-482
Exam Name: Advanced Windows Store App Development Using HTML5 and JavaScript
Certification Provider: Microsoft
Corresponding Certifications: MCSD, MCSD: Windows Store Apps

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Case Study – Scenario 1 (QUESTION 1 – QUESTION 16)
Application Information
You are developing two Windows Store apps by using JavaScript: a Personal Trainer app and a Client app. The apps will allow personal fitness trainers to interact with their remote clients.
Business Requirements-Personal Trainer Application
The Personal Trainer app must allow trainers to perform the following tasks:
– Create and store video and audio recordings of workout routines.
– View the profile and workout recordings for only one client at any time.
Business Requirements-Client Application
The Client app must allow clients to perform the following tasks:
– Browse a list of the trainer’s workout recordings.
– Record workouts by using the built-in webcam.
– Play, pause, restart, and stop workout recordings.
– If the capability is supported, allow the client’s webcam to pan as the client moves around the room.
– Upload workout recordings for trainer review.
– Update their individual profiles to indicate workouts completed, calories burned, and current weight.
The Client app must validate that the client’s subscription is valid.
Technical Requirements-General
The Personal Trainer and Client apps must meet the following technical requirements:
– Connect to the Internet.
– Store workout recordings in the cloud.
– Enable retrieval of workout recordings by using a custom URL.
– Encapsulate the video player in a custom control. Identify the maximum zoom of the user’s webcam in millimeters.
– Store client profiles in XML files in the trainers’ Documents folders to allow for disconnected editing.
– Synchronize the XML files with cloud storage by using a background task when the Internet is available.
– Send trainer workout videos to cloud storage by using a background task when the trainer’s device is idle. Indicate the status of the upload operation each time the trainer starts the app. Suspend the background task when the Internet is not available.
– Separate business and complex logic into WinMD components. The solution debugging settings must include the WinMD components.
Technical Requirements-Hardware Requirements
The Personal Trainer and Client apps must support the following hardware requirements:
– Windows 8
– Webcam, microphone, and speakers
– Internet connection
While testing the apps, you identify the following issues:
– When you start the app for the first time, the system displays this warning message: “This app needs permission to use your camera, which you can change in the app’s settings.”
– When you run the loadClientProfile( ) method in the clientData.js file, you receive an “Access Denied” exception.
– The findCamera( ) method in the video.js file throws an exception on some devices.
– The recordVideo( ) method in the video.js file throws an exception when the device does not support tilting.

QUESTION 1
You need to complete the code to start the background task.
Which code segment should you insert at line BG07?

A.    Windows.ApplicationModel.Background.SystemTriggerType.connectedStateChange, true
B.    Windows.ApplicationModel.Background.SystemTriggerType.networkStateChange, false
C.    Windows.ApplicationModel.Background.SystemTriggerType.sessionConnected, true
D.    Windows.ApplicationModel.Background.SystemTriggerType.internetAvailable, false

Answer: D

QUESTION 2
You need to identify the required camera specifications.
Which code segment should you insert at line VD06?

A.    var maxZoom = videoDev.zoom.capabilities.max;
B.    var cameraType = videoDev.extendedZoomProperties(“cameraType”);
C.    var cameraZoom = videoDev.zoom;
D.    var minZoom = mediaCaptureSettings.min.millimeters;

Answer: A

QUESTION 3
You need to attach the background task.
Which code segment should you insert at line BG09?

A.    var task = builder.register( );
B.    var task = Windows. ApplicationModel.Background.BackgroundTaskBuilder.insert (builder);
C.    var task: = Windows.ApplicationModel.Background.BackgroundTaskBuilder.insert
(builder, this);
D.    var task = builder.setTrigger ( );

Answer: A

QUESTION 4
You need to set the default storage location for the client profiles.
Which code segment should you insert at line CD04?

A.    fop.defaultFolder = Windows.Storage.Pickers.PickerLocationId.documentsLibrary;
B.    fop.defaultFolder = environment.getFolderPath (environment.specialFolder.applicationData);
C.    fop.suggestedStartLocation = “%AppData%”;
D.    fop.suggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.documentsLibrary;

Answer: A

QUESTION 5
You need to prevent the exception that is being thrown by the findCamera( ) method.
What should you do?

A.    Check the devices collection for multiple devices.
B.    Place a try block immediately after line VD12 and a catch block immediately before line VD17.
In the catch block, display the message property of the exception object to the user.
C.    In line VD10, set the cameraID variable to null.
D.    Check the devices collection for null before setting the cameraID variable.

Answer: D

QUESTION 6
You need to debug the error that is displayed in the warning message.
What should you do?

A.    In the package.appxmanifest file, set the Webcam property in the Capabilities list.
B.    Insert the following code segment at line VD18:
var dialog = new Windows.Media.Capture.CameraCaptureUI( );
dialog.photoSettings.enableCamera( );
C.    In the package.appxmanifest file, add Camera Settings to the available declarations.
D.    Insert the following code segment at line VD18:
var dialog = new Windows.Media.Capture.CameraCaptureUT( );
dialog.videoSet tings.enableCamera ( );

Answer: A

QUESTION 7
You need to ensure that client profiles can be saved in the required file format.
Which code segment should you insert at line CD21?

A.    fop.suggestedSaveFile = “*.txt”;
B.    sp.fileTypeChoices.insert(“Client Files”, [“.txt”]);
C.    sp.fileTypeChoices = new.fileTypeItem(“Client Files”, [“.xml”]);
D.    sp.fileTypeChoices.insert(“Client Files”, “.xml”]);

Answer: D

QUESTION 8
You need to validate whether the additional video recording functionality for the Client app is supported.
Which code segment should you insert at line VD05?

A.    var canPan = mediaCaptureSettings.pan.capabilities.supported;
B.    var canPan = videoDev.pan.capabilities.supported;
C.    var canTilt = videoDev.getDeviceProperty(“tilt”);
D.    var canTilt = videoEev.getDeviceProperty(“tilt supported”);

Answer: B

QUESTION 9
You need to handle the exception error in the clientData.js file.
What should you do?

A.    Modify the display function to handle the error.
B.    Insert a try statement immediately after line CD07 and a catch block immediately before
line CD14. Handle the error in the catch block.
C.    Modify the processError function to handle the error.
D.    Insert a try statement immediately after line CD01 and a catch block immediately before
line CD15. Handle the error in the catch block.

Answer: A

QUESTION 10
You need to validate whether the additional video recording functionality for the Client app is supported.
Which code segment should you insert at line VD05?

A.    var canFocus = videoDev.getEeviceProperty(“focus”);
B.    var car.Zoom = videoDev.getEeviceProperty (“zoom”) ;
C.    var canPan = videoDev.pan.capabilities.supported;
D.    var canPan = mediaCaptureSettings.pan.capabilities .supported;

Answer: C

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