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Microsoft Recertification for MCSD: Windows Store Apps using C# Sample Questions:

1. You need to authenticate to a social networking site.
Which code segments should you insert at line SR40? (Each correct answer presents part of the solution. Choose all that apply.)

A) WebAuthenticationOptions.SilentMode,
B) source.RequestUri,
C) source.RequestUri.SecureString,
D) WebAuthenticationOptions.None,

2. DRAG DROP
You need to write code for the method that will be called when a user takes a picture. (Develop the solution by arranging the code snippets. You will need all of the code snippets.)

3. 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.WebAccount
B) System.Net.NetworkCredential
C) Windows.Security.Credentials.PasswordVault
D) System.Net.AuthenticationManager

4. HOTSPOT
You are developing a Windows Store app.
You define an app bar named BottomAppBar.
You need to ensure that you can open the app bar programmatically.
You have the following code:

Which code snippets should you insert in Target 1 and Target 2 to complete the code? (To answer, select the correct code snippet from each drop-down list in the answer area.)

5. DRAG DROP
You are developing a Windows Store social media app. The app communicates with the
server by using a secure web service.
You need to ensure that users can securely store and retrieve web service credentials.
You have the following code:

Which code snippets should you insert 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.)

Solutions: