Microsoft 70-491

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

2. DRAG DROP
You are developing a Windows Store app.
The app consumes data from a business layer.
You need to develop a unit test.
The test method must ensure that the collection of person objects returned by the business
layer meets the following requirements:
- Always contains elements
- Orders elements consistently between calls
You have the following code:

Which code snippets should you include in Target 1, Target 2, Target 3 and Target 4 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 are developing a Windows Store app that will provide users with the ability to create photos by using the hardware on a device.
Once the users create the photos, they can save the photos to the Pictures library.
If the users sign in by using a Microsoft account, they can grant other users remote access
to the photos.
You need to identify which capabilities must be enabled for the app.
Which three capabilities should you identify? (Each correct answer presents part of the
solution. Choose three.)

A) Enterprise Authentication
B) Proximity
C) Webcam
D) Private Networks (Client & Server)
E) Internet (Client & Server)
F) Pictures Library

4. DRAG DROP
You need to allow users to capture video instead of photos. 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. 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.)

Solutions: