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

1. HOTSPOT
You are developing a Windows Store app.
You need to encrypt data.
How should you complete the code segment? (To answer, select the appropriate line of
code from each drop-down list in the answer area.)

2. You are designing a Windows Store app that creates large amounts of temporary binary data each time it is run.
You need to ensure that data is persisted while the app is running but deleted when the app is closed.
Which app data storage mechanism should you use? (Each correct answer presents a complete solution. Choose all that apply.)

A) the app files of the local app data store
B) a temporary app data store
C) the app settings of the local app data store
D) a roaming app data store

3. HOTSPOT
You are developing a Windows Store app.
The app receives badge notifications from Windows Push Notification Services (WNS).
You configure the app to establish a communication channel with WNS. You use a variable named pushChannel to store the notification channel object used for communication. You add the following line of code to the app:

Which code snippets should you insert in Target 1, Target 2 and Target 3 to complete the code? (To answer, select the correct code snippet from each drop-down list in the answer area.)

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

5. HOTSPOT
You are developing a Windows Store app to check the weather.
You need to ensure the app polls an external web service once per hour for tile updates.
You have the following code:

Which code snippet should you insert in Target 1 to complete the code? (To answer, select the correct code snippet from the dropdown list in the answer area.)

Solutions: