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

1. You are designing a Windows Store app to manage image and video files.
The app must meet the following requirements:
Video files must be stored locally on each device.
The app must use local storage for data caching.
User settings must be shared across multiple devices.
Image files must be available across multiple devices.
Metadata for images must be stored in a central database.
Image files, video files, and their associated metadata must load as quickly as
possible.
You need to identify which data must be cached based on the app requirements.
Which two types of data should you identify? (Each correct answer presents part of the solution. Choose two.)
------

A) Metadata
B) User settings
C) Video files
D) Image files

2. You place a breakpoint at line MP31 in the app.
When you debug the app, the debugger continuously catches a
System.UnauthorizedAccess exception.
You need to resolve the exception.
What should you do?

A) At line MP10, change the code segment to the following line of code. read if(cameraUI != null)
B) At line PA25, insert the following line of code. <Capability Name="picturesLibrary"/>
C) Wrap lines CE43 through CE46 in a try-catch statement.
D) Move line CE09 to CE16.

3. 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.)

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

5. You plan to create a custom panel that displays a pie chart. Each value of the pie chart will have a control.
You need to register a custom dependency property to the panel.
Which code segment should you use?

A) Option D
B) Option B
C) Option C
D) Option A

Solutions: