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Microsoft 070-491 Exam Syllabus Topics:

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

1. You are developing a Windows Store app.
The app will store data in a text file.
You create the following method to store encrypted text in the text file:

The WriteData method writes the contents of an IBuffer object to a StorageFile object.
You need to recommend a solution to encrypt the data. The solution must minimize the use
of system resources and must ensure that the app can decrypt the data.
Which code segment should you recommend adding to line 06?

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

2. DRAG DROP
You are developing a Windows Store app that uses a light sensor to detect and respond to light changes. An object named lightSensor is an instance of the sensor service.
The light sensor must detect changes once per second. If the sensor is unable to record as fast as once per second, then it must use the fastest interval possible.
You need to ensure that the app meets the requirements. You have the following code:

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.)

3. You need to protect the metadata for the secure documents.
Which protection descriptor should you use for the DataProtectionProvider object?

A) LOCAL=user
B) USER=current
C) SID
D) WEBCREDENTIALS=userrpassword

4. DRAG DROP
You are developing a Windows Store app.
The app has the following accessibility requirements: - The automation name of each text box must be the same as the text box caption. - Each Label element must be associated with its corresponding text box. You need to create an interface that meets the requirements.
You have the following code:

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.)

5. DRAG DROP
You are developing a Windows Store app.
You need to ensure that the app meets the following requirements:
- When the app is started, the app bar must appear at the top of the app. - When the app is resized, if the new width of the app is less than 400 pixels, the app bar must be hidden. Users must be able to show the app bar by right-clicking.
- When the app is resized, if the new width is greater than 400 pixels, the app bar must be visible. Users must be able to hide the app bar by right-clicking, pressing Windows + Z, or swiping in from the top edge of the screen.
You have the following XAML markup in a file named MainPage.xaml. (Line numbers are included for reference only.)

You have the following code in a file named MainPage.xaml.es. {Line numbers are included for reference only.)

Which code segments should you insert in MainPage.xaml and MainPage.xaml.cs? (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.)

Solutions: