Microsoft-Advanced Windows Store App Development using C#

You need to implement the requirements for the playback of media. What should you do? (Each correct answer presents part of the solution. Choose all that apply.) Scenario Margie's Travel (Case Study): You are developing a Windows Store media sharing app for the sales and marketing team at Margie's Travel. The app will allow team members to download documents and media about current and proposed products and services from the company's cloud-based media manager service. Team members will be able to add new content to the cloud service and to print and share content. Business Requirements Behavior: - Team members must be able to download product information data sheets, marketing materials, and product demonstration video clips from the company's server. - Team members must be able to select and upload multiple files that contain new and modified content as a batch. - Team members must be able to stream video clips to other devices in the vicinity of the team member's device. The app will not support the streaming of photographs. - The app must allow team members to pause, restart, or cancel uploads and downloads of files. The app must report both the progress and completion status of these operations. It must also return results about upload and download operations. User Interface: - The app must include a photo viewer - When photos are added or deleted in the photo viewer window, they must animate in and out of the field of view. Remaining photos must move to fill the empty space created when photos are deleted. The photo viewer must support semantic zoom. - The app must display information on the lock screen of the device. The information must include text-based alerts and a value indicating the number of pending file downloads. Technical Requirements Behavior: - The company has an existing component named VideoProcessor. This component compresses video clips and performs other processing before the video clips are uploaded to the media manager service. The component was written with managed code. The VideoProcessor component will also be used by Windows Store apps developed in HTML5 and JavaScript. The apps must be able to call the overload of the ProcessVideo() method that accepts a string and a Boolean value as parameters. - When a team member selects a video clip to download, the app must download the file as a background task. After a download has started, the app should maintain the network connection User Interface: - The app must include a custom photo viewer control. The control will be updated frequently and may be deployed separately from the rest of the app. The photo viewer control must support templates and styles. User Interface: - The app must include a custom photo viewer control. The control will be updated frequently and may be deployed separately from the rest of the app. The photo viewer control must support templates and styles. - The app must use a Grid control as the root layout control. The photo viewer must be placed in the second row of the grid. - The appearance of the app must change when the app is in snapped mode. The first row of the root layout grid must not change height. The second row must fill all available space. - Available video clips must be displayed in an extended ListView control class named Downloaded VideoList. - The template for the DownloadedVideoList is already defined. - New video clips should be added to DownloadedVideoList when the DownloadVideoQ method completes. - New video clip items in the DownloadedVideoList should color change periodically to alert the team member. Application Structure Relevant portions of the app files are as follows. (Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.)

You are developing a Windows Store app that uses a webcam. You need to be notified if new webcams are connected to the system. Which class should you use?

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?

You are developing a Windows Store app. The app has the following requirements: - Files must be stored on a device's file system so other Windows Store apps can access them. - Additional configuration must be performed to make the location of the files available to other Windows Store apps. You need to meet the requirements. Where should you store the files? (Each correct answer presents a complete solution. Choose all that apply.)

You are developing a Windows Store app that requires access to a user's location. A user denies the app access to the location service. You need to handle the error that results when the app calls the GetGeopositionAsync() method. What should you do?

You are developing a Windows Store app for geocaching competitions that displays location- aware tips. You need to capture device location events periodically to determine if a tip should be displayed. What should you do? (Each correct answer presents part of the solution. Choose all that apply.)

You need to modify the existing GetCurrentEnvironmentAsync() method in the Environment WinMD component to accept parameters. Which type should you use at line CE07? Scenario Geese (Case Study): Background You are developing a Windows Store app. The app will allow ornithologists to photograph migrating geese, taking note of the location, heading, and weather conditions at the time each photo is taken. BusinessRequirements The app must adhere to the following requirements: - Create and store photographs of migrating geese. - Record the location and weather conditions where the photograph was taken. - Record the heading and time that the photograph was taken. - Allow the user to display the information on any device that supports the PlayTo feature. TechnicalRequirements General: The app must meet the following technical requirements: - The app must store images and image metadata in the Pictures Library. - The metadata logic must be encapsulated within a reusable component named LogicComponentl. - The metadata logic must be available to Windows Store apps written in Visual Basic, C#, JavaScript, and C+ +. Hardware: - The app requires a device with camera, compass, and GPS features. - The app requires a device with Internet capabilities.

You need to set the PlayTo source in the LoadFile() method. Which line of code should you insert at line PT30? Scenario Geese (Case Study): Background You are developing a Windows Store app. The app will allow ornithologists to photograph migrating geese, taking note of the location, heading, and weather conditions at the time each photo is taken. BusinessRequirements The app must adhere to the following requirements: - Create and store photographs of migrating geese. - Record the location and weather conditions where the photograph was taken. - Record the heading and time that the photograph was taken. - Allow the user to display the information on any device that supports the PlayTo feature. TechnicalRequirements General: The app must meet the following technical requirements: - The app must store images and image metadata in the Pictures Library. - The metadata logic must be encapsulated within a reusable component named LogicComponentl. - The metadata logic must be available to Windows Store apps written in Visual Basic, C#, JavaScript, and C+ +. Hardware: - The app requires a device with camera, compass, and GPS features. - The app requires a device with Internet capabilities.

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? Scenario Geese (Case Study): Background You are developing a Windows Store app. The app will allow ornithologists to photograph migrating geese, taking note of the location, heading, and weather conditions at the time each photo is taken. BusinessRequirements The app must adhere to the following requirements: - Create and store photographs of migrating geese. - Record the location and weather conditions where the photograph was taken. - Record the heading and time that the photograph was taken. - Allow the user to display the information on any device that supports the PlayTo feature. TechnicalRequirements General: The app must meet the following technical requirements: - The app must store images and image metadata in the Pictures Library. - The metadata logic must be encapsulated within a reusable component named LogicComponentl. - The metadata logic must be available to Windows Store apps written in Visual Basic, C#, JavaScript, and C+ +. Hardware: - The app requires a device with camera, compass, and GPS features. - The app requires a device with Internet capabilities.

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 Getl_ocationAsync() method of the app. What should you do? Scenario Geese (Case Study): Background You are developing a Windows Store app. The app will allow ornithologists to photograph migrating geese, taking note of the location, heading, and weather conditions at the time each photo is taken. BusinessRequirements The app must adhere to the following requirements: - Create and store photographs of migrating geese. - Record the location and weather conditions where the photograph was taken. - Record the heading and time that the photograph was taken. - Allow the user to display the information on any device that supports the PlayTo feature. TechnicalRequirements General: The app must meet the following technical requirements: - The app must store images and image metadata in the Pictures Library. - The metadata logic must be encapsulated within a reusable component named LogicComponentl. - The metadata logic must be available to Windows Store apps written in Visual Basic, C#, JavaScript, and C+ +. Hardware: - The app requires a device with camera, compass, and GPS features. - The app requires a device with Internet capabilities.