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Microsoft Recertification for MCSD: Windows Store Apps using HTML5 Sample Questions:

1. You are developing a Windows Store enterprise app.
The app must retrieve data from other apps asynchronously across domains by using the XMLHttpRequest object.
You need to retrieve the data.
What should you use?

A) HTTPClient
B) WinJS.xhr
C) GetResponseStream()
D) HttpWebRequest

2. HOTSPOT
You are developing a Windows Store app. The app contains the following HTML markup segment:

The app must stream video to available devices by using the Play to feature. You need to implement the Play to contract for the app.
How should you complete the relevant code? To answer, select the appropriate code segments from the lists in the answer area.

3. You are developing a Windows Store app. The app will allow users to upload and share
text messages.
The app must upload each message to a Windows Azure back-end database. The stored
data must be encrypted by using public/private key encryption.
You need to implement data encryption for the app. Which code segment should you use?

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

4. In the following code segment, three functions return WinJS.Promise objects.

You need to chain the promise operations to optimize error handling. Which code segment should you use?

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

5. You need to retrieve the background task collection for the iteration loop.
Which code segment should you insert at line BG14?

A) var tasks = Windows.ApplicationModel.Background.BackgroundTaskRegistration.allTasks();
B) var tasks = Windows.ApplicationModel.Background.BackgroundTaskBuilder.allTasks.first();
C) var tasks = Windows.ApplicationModel.Background.BackgroundTaskRegistration.allTasks.first();
D) var tasks = Windows.ApplicationModel.Background.BackgroundTaskRegistration.first();

Solutions: