Application Data
You are making use of JavaScript to create two Windows Store apps, namely a Tutor app
and a Student app. The apps should enable tutors to remotely interact with students.
Business Prerequisites - Tutor Application
Tutors should be able to create and store video and audio recordings of lessons. Also, the
profile and lesson recordings for only one student should be visible to tutors at any time.
Business Prerequisites - Student Application
Students should be able to peruse a list of the tutor's lessons, as well as record lessons via
the built-in webcam. Students should also be able to play, pause, restart, and stop lessons.
Furthermore, students must have the ability to upload lessons for tutor assessment, as well
as update their specific profiles to specify completed lessons.
You have to make sure that the Student app confirms the student's valid subscription.
Technical Prerequisites- General
Both apps should be able to connect to the Internet, and store lessons in the cloud. The
apps should also allow for lessons to be accessed via a custom URL, and for a custom
control to encapsulate the video player.
The zoom limit of user's webcam, in mil imeters, should be detectible. To allow for
disconnected editing, the tutors' Documents folders should host student profiles in XML files.
A background task should be used to synchronize the XML files with cloud storage when the
Internet is available.
A background task should also be used to transmit tutor lesson videos to cloud storage
when the tutor's device is inactive. Whenever the tutor starts the app, the upload operation
status should be shown. In the event that the Internet is unavailable, the background task
should be postponed.
Business and complex logic must be divided into WinMD components, which should be
included in the solution debugging settings.
Technical Prerequisites - Hardware Prerequisites
The use of Windows 8, Webcams, microphones, speakers, and Internet connections should
be allowed by both apps.
Problem Statements
When you initially start the app during testing, you are presented with a message, which
warns you that permission is required to use your webcam. The message also informs you
that you have to access the app settings to grant the necessary permission.
Making use of the loadStudentProfile() method in the studentData.js file, results in an
"Access Denied" exception. Making use of findCamera() method in the video.js file, results in
an exception being thrown on certain devices. In the event of tilting not being supported by
the device, an exception is thrown in the video.js file by the recordVideo() method.

QUESTION: 1
You have been instructed to make sure that the background task is initialized.
You are planning to make use of the Windows.ApplicationModel.Background class.
Which class of the Windows.ApplicationModel.Background class should be used?

A. The TimeTrigger class.
B. The SystemTrigger class.
C. The SystemCondition class.
D. The PushNotificationTrigger class.
Answer(s): B
QUESTION: 2

2

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