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QUESTION 121
You are developing a Windows Store app.
The app will access several web resources that use an OAuth 2.0 authentication provider.
You need to recommend in which class to store user credentials so that users do not have to reenter their credentials when they access the web resources.
Which class should you recommend?
A. Windows.Security.Credentials.PasswordVault
B. Windows.Security.Credentials.UI.CredentialPicker
C. windows.Security.Authentication.Onlineld.OnlineldAuthenticator
D. windows.Security.Credentials.WebAccount
Answer: A
Explanation:
The task of storing and retrieving user credentials securely and allowing user credentials roam at no cost with the user’s Microsoft account is simplified with the Credential Locker.
Storing user credentials in the Credential Locker is a quick, two-step process.
1.Obtain a reference to the Credential Locker using the PasswordVault object from the Windows.Security.Credentials namespace.
2.Create a PasswordCredential object that contains an identifier for your app, the username and the password, and pass that to the PasswordVault.Add method to add the credential to the locker.
QUESTION 122
You are developing a Windows Store app that will display a toast notification.
You need to ensure that when a toast notification is displayed, the first line of the notification is bold.
Which template should you use?
A. TileSquareText03
B. ToastText01
C. TileSquarePeeklmageAndText01
D. ToastImageAndText02
Answer: D
Explanation:
ToastImageAndText02
A large image, one string of bold text on the first line, one string of regular text wrapped across the second and third lines.
QUESTION 123
You are developing a Windows Store app that will back up video files.
The app will support videos up to 1 GB in size.
If users lose their device, they must be able to restore the video files to a new device.
You need to recommend a storage solution for the app.
Which storage solution should you recommend?
A. Windows Azure blob storage
B. SQLite for Windows Runtime
C. windows Azure Table Storage
D. video library
Answer: A
Explanation:
Azure Blob storage is a service for storing large amounts of unstructured data that can be accessed from anywhere in the world via HTTP or HTTPS. A single blob can be hundreds of gigabytes in size, and a single storage account can contain up to 200 TB of blob, queue, and table data.
Common uses of Blob storage include:
– Serving images or documents directly to a browser
– Storing files for distributed access
– Streaming video and audio
– Performing secure backup and disaster recovery
– Storing data for analysis by an on-premises or Azure-hosted service
QUESTION 124
You are creating a Windows Store app.
You need to create a gradient brush that is white in the top left corner to black in the bottom right corner.
You have the following xaml markup. (Line numbers are included for reference only.)
Which XAML markup segments should you insert at lines 02 and 04? (To answer, drag the appropriate XAML markup segment to the correct locations in the answer area. Each XAML markup segment 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 125
You are developing a Windows Store game.
The game allows for interactive online play between users.
The game authenticates users by using the credentials of a third-party site that provides OAuth2 authentication.
You need to implement authentication that uses an implicit grant authorization.
How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment 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 126
You are developing a Windows Store app.
App.xaml contains the following XAML markup:
For each of the following statements, select Yes if the statement is true. Otherwise, select No. Each correct selection is worth one point.
Answer:
QUESTION 127
You are developing a page for an app.
The page uses the following XAML markup:
The grid takes the full width of the page and has no margins.
For each of the following statements, select Yes if the statement is true. Otherwise, select No. Each correct selection is worth one point.
Answer:
QUESTION 128
You are developing a Windows Store app.
A page named Profile collects information about the user, including his or her name, in a control named Name. A page named Journal allows the user to make a journal entry.
You need to pass the user’s name to the Journal page when the user navigates from the Profile page to the Journal page.
You have the following code:
protectedNavigateToJournal()
{
Target 1
}
Which code snippet should you insert in Target 1 to complete the code? (To answer, select the correct code snippets from the dropdown list.)
Answer:
QUESTION 129
You have been asked to implement an application in which the user can select one or more contacts.
What code should you use to provide this option to the user?
A. while (true) { ContactPicker.PickSingleContactAsync(); }
B. IReadOnlyList<Contact> contacts =
await ContactPicker.PickMultipleContactsAsync();
C. IReadOnlyList<ContactInformation> contacts =
await contactPicker.PickMultipleContactsAsync();
D. IReadOnlyList<ContactInformation> contacts =
contactPicker.PickMultipleContactsAsync();
Answer: C
QUESTION 130
You are developing a Windows Store checkers game.
Game pieces are moved by using manipulation events.
Moving a game piece on top of another game piece captures the bottom piece.
The captured piece must be identified and removed from the board.
You need to identify when a game piece is captured.
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:
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