Vendor: Microsoft
Exam Code: 70-485
Exam Name: Microsoft Advanced Windows Store App Development using C#
Version: 12.79

QUESTION 51
Exceptions occur when the WriteAuditAsync() method of the Auditor object is run.
The UI must remain responsive to user actions.
You need to handle the exceptions.
Which code segment should you use?

A.    Option A
B.    Option B
C.    Option C
D.    Option D

Answer: A

QUESTION 52
Drag and Drop Question
You need to add a Print button to the app.
Which three actions should you perform in sequence? (To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.)

Answer:

QUESTION 53
You need to register the SocialPoller background task in the constructor of the Page1 class.
Which statement sets the appropriate task entry point at line PG19?

A.    builder.TaskEntryPoint = "Sreader.Background.SocialPoller";
B.    builder.BackgroundTableStart = "SocialPoller.Ereader.Background";
C.    builder.TaskStart = "Pagel.SocialPoller ";
D.    builder.TaskEntryPoint = "Sreader.Pagel";

Answer: A

QUESTION 54
You need to deactivate features of the app when it runs as a trial.
Which lines of code should you use for the production app? (Each correct answer presents part of the solution. Choose all that apply.)

A.    licenseInforination.LicenseChanged += new LicenseChangedEventHandler (modifyLicense)
B.    license.LicenseChanged += new LicenseChangedEventHandler(implementLicense)
C.    licenseInformation = CurrentApp.GetCurrentLicense()
D.    licenseInforrcation = CurrentApp.Licenselnformation
E.    license = CurrentApp.GetCurrentLicense()
F.    licenselnformation.LicenseChanged += new LicenseChangedEventHandler (implementLicense)

Answer: BD
Explanation:
B: // Register for the license state change event. licenseInformation.addEventListener("licensechanged", reloadLicense);
D: Initialize the CurrentApp or CurrentAppSimulator to access the app’s license info.
Example:
// Get the license info
licenseInformation = currentApp.licenseInformation;
* From scenario:
/ The app must provide trial functionality that will expire after 14 days. If the app expires while it is running, the app must display an expiration message to the user and prompt the user to purchase the app.

QUESTION 55
You need to set the default print options according to the requirements.
Which lines of code should you use at line PG33? (Each correct answer presents part of the solution. Choose all that apply.)

A.    printTask.Options.Orientation = a PrintOrientation.Portrait;
B.    printTask.Options.Orientation = Print.Default = Portrait;
C.    printTask.Options.MediaSize = Print.Default = MediaSize.Legal;
D.    printTask.Options.ColorMode = Print.ColorDefault = Grayscale;
E.    printTask.Options.ColorMode = PrintColorMode. Grayscale;
F.    printTask.Options.MediaSize = PrintMediaSize.Letter;

Answer: AE
Explanation:
A: PrintOrientation enumeration
Specifies the orientation options for the printed output Portrait | portrait (value 3), The Portrait orientation option.
E: We can also choose what we feel the default setting should be. Maybe we really wanted the Color Mode to be set to grayscale rather than color.
printTask.options.colorMode = _printing.PrintColorMode.graysc
From scenario:
Printing:
The default printing options are portrait orientation and grayscale color mode. The app must enable the user to select the media size and printing orientation.

QUESTION 56
Drag and Drop Question
You need to call the DoWork() method asynchronously in a background task.
Which four lines of code should you use to create the Run() method on line SP13? (To answer, move the appropriate lines of code from the list of code segments to the answer area and arrange them in the correct order.)

Answer:

QUESTION 57
You need to update the DoWork() method of the background task to meet the requirements.
What should you do? (Each correct answer presents part of the solution. Choose all that apply.)

A.    Get the IsCancellationRequested property from the CancellationToken object and return a Task
CompletionSource object.
B.    Access the Progress object and report the task’s progress to the caller.
C.    Update the DoWork() method to receive a Progress object.
D.    Add the CancellationToken object to the client.GetAsync() method.
E.    Confirm that the IsCancellationRequested property of the CancellationToken object is true and exit
the task.
F.    Update the DoWork() method to receive a CancellationToken object in the arguments of the method.

Answer: DEF
Explanation:
Cancellation is controlled by the CancellationToken structure. You expose cancellation tokens in the signature of cancelable async methods, enabling them to be shared between the task and caller. In the most common case, cancellation follows this flow:
(D) The caller creates a CancellationTokenSource object. (F) The caller calls a cancelable async API, and passes the CancellationToken from the CancellationTokenSource (CancellationTokenSource.Token). The caller requests cancellation using the CancellationTokenSource object (CancellationTokenSource.Cancel()).
(E)The task acknowledges the cancellation and cancels itself, typically using the CancellationToken.ThrowIfCancellationRequested method.
* From scenario:
/ The SocialPoller background task must run the code in the DoWork() method to collect content from the Contoso feed.
/ The UI must always remain responsive to user actions.
Note:
* Task-based Asynchronous Pattern
* CancellationToken Structure
/ Propagates notification that operations should be canceled.
/ CancellationToken. IsCancellationRequested
Gets whether cancellation has been requested for this token.

QUESTION 58
You need to enable the capabilities that allow communication according to the technical requirements.
Which capabilities should you enable? (Each correct answer presents part of the solution.
Choose all that apply.)

A.    Shared User Certificates
B.    SSL Certificates
C.    Internet (Client)
D.    Default Windows Credentials

Answer: BC
Explanation:
B: From scenario:
Communication between the app and e-book vendors must occur over an encrypted communication channel.
Communication must use certificates to enable the SSL connection.
C:

QUESTION 59
Drag and Drop Question
You need to ascertain whether the app trial period has expired.
You have the following code that you plan to insert at line AX22 of App.xaml.cs:

Which code snippets should you include in Target 1 and Target 2 to complete the code? (To answer, drag the appropriate code snippets to the correct targets in the answer area. Each code snippet may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

QUESTION 60
You need to handle the following exception and meet the error handling requirements.

Which code segment should you use?

A.    Option A
B.    Option B
C.    Option C
D.    Option D

Answer: A

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