Exam 70-482 Advanced Windows Store App Development Using HTML5 and JavaScript

Published: October 4, 2012
Languages: English, Chinese (Simplified), French, German, Japanese, Portuguese (Brazil)
Audiences: Developers
Technology: Visual Studio 2012
Credit toward certification: MCP, MCSD

Skills measured
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As of November 18, 2013, this exam includes content covering Windows 8.1 and Visual Studio 2013.

Develop Windows Store apps (15-20%)
Create background tasks
Implement the Windows.applicationmodel.background classes; implement WebUIBackgroundTaskInstance; create a background task to manage and preserve resources; create a background task to get notifications for an app; register the background task by using the BackgroundTaskBuilder class; prioritize tasks by using the Scheduler namespace
Consume background tasks
Use timing triggers and system triggers; keep communication channels open; request lock screen access; use the backgroundtransfer class to finish downloads
Integrate WinMD components into a solution
Consume a WinMD component in JavaScript; handle WinMD reference types; reference a WinMD component

Preparation resources
Background task sample
Windows Runtime Components in a .NET World

Discover and interact with devices (15-20%)
Capture media with the camera and microphone
Use CameraCaptureUI to take pictures or video, and configure camera settings; use MediaCapture to capture pictures, video, and audio; configure camera settings; set media formats; handle media capture events; implement advanced photo capabilities, such as sequence mode, thumbnails, and focus mode
Get data from sensors
Determine the availability of a sensor (Windows.devices.sensors); add sensor requests to the app manifest; handle sensor events; get sensor properties; determine location via GPS; enable geofencing
Enumerate and discover device capabilities
Discover the capabilities and properties of available devices, for example, GPS, removable storage, accelerometer, and near field communication
Implement device access
USB; Bluetooth; Human Interface Device (HID); 3D printer support; Point of Service (PoS) devices

Preparation resources
CameraCaptureUI Sample
Bluetooth device support
USB device support

Program user interaction (15-20%)
Implement printing by using contracts and charms
Implement the print contract; create a custom print template; construct a print preview; handle print pagination; implement in-app printing; expose printer settings within an app
Implement Play To by using contracts and charms
Register an app for Play To; use PlayToManager stream media assets; register an app as a PlayToReceiver; programmatically implement PlayTo functionality
Notify users by using Windows Push Notification Service (WNS)
Authenticate with WNS; request, create, and save a notification channel; call and poll the WNS; configure and implement push notifications by using Azure Mobile Services

Preparation resources
Azure Mobile Services for Windows Store app and Android app developers

Enhance the user interface (15-20%)
Design for and implement UI responsiveness
Choose an asynchronous strategy between web workers and promises; implement web workers; nest and chain promises; make custom functions promise-aware; improve interface performance by using the Scheduler namespace
Implement animations and transitions
Apply animations from the animation library (WinJS.UI.animation); create and customize animations and transitions by using CSS; apply transformations; create animations by using keypoints; apply timing functions; animate with the HTML5 <canvas> element
Create custom controls
Create custom controls using WinJS.Namespace, WinJS.Class.define, and HTML; bind to custom controls with data-win-bind; inherit from and extend an existing WinJS control
Design apps for globalization and localization
Implement .resjson files to translate text; implement collation and grouping to support different reading directions; implement culture-specific formatting for dates and times; bind JSON properties to resources by using the data-win-res property

Preparation resources
Globalizing your app (Windows Store apps using JavaScript and HTML)

Manage data and security (15-20%)
Design and implement data caching
Choose which types of items (user data, settings, application data) in your app should be persisted to the cache based on requirements; choose when items are cached; choose where items are cached (Microsoft Azure, Azure Mobile Services, remote storage); select a caching mechanism; store data by using indexDB, LocalStorage, and SessionStorage
Save and retrieve files
Handle file streams; save and retrieve files by using the StorageFile and StorageFolder classes; set file extensions and associations; save and retrieve files by using file pickers and the folder picker; compress files to save space; access libraries and KnownFolders, for example, pictures, documents, and videos; manage appearance of the file picker; improve searchability by using Windows Index; integrate OneDrive with apps; compare files; manage libraries
Secure application data
Encrypt data by using the Windows.Security.Cryptography namespace; enroll and request certificates; encrypt data by using certificates; revoke file permissions

Prepare for a solution deployment (15-20%)
Design and implement monetization features in an app
Set up a timed trial; set up a feature-based trial; implement in-app purchases; transition an app from trial to full
Design for error handling
Design the app so that errors and exceptions never reach the user; handle device capability errors; handle promises errors
Design and implement a test strategy
Design a functional test plan; implement a coded UI test; design a reliability test plan, including performance testing, stress testing, scalability testing, and duration testing; simulate in-app purchases
Design a diagnostics and monitoring strategy
Design profiling, tracing, performance counters, audit trails (events and information), and usage reporting; decide where to log events (local vs. centralized reporting)
Evaluate and configure for Windows Store deployment
Configure app options to submit to the Windows Store, such as age restrictions, privacy statement, permissions, images, and contact information; create application files, resource files, and application bundles; verify application readiness by using the Windows Application Certification Kit (WACK)

Preparation resources
Testing Windows Store apps
Debugging and testing


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

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