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

1. You develop a Windows Store app that allows users to modify images by using filters and image-processing algorithms.
The app must meet the following requirements:
- Use a web worker to initiate the image-processing algorithms on a separate thread. - Clean up the web worker after processing the algorithms.
You need to ensure that the web worker releases memory after processing the algorithms. What should you do?

A) From the calling page, call the closet) command.
B) From the web worker, call the close() command.
C) From the calling page, call the postMessage() command with the terminate parameter.
D) From the web worker, call the GCollect method.

2. You need to modify the app so that the user can play videos by tapping the screen. What should you do?

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

3. You are developing a Windows Store app. The app includes a handler for the suggestions requested event. The empty event handler is shown in the following code. (Line numbers are included for reference only.)

The app must meet the following requirements:
- Provide an app-defined list of choices in the Search pane that responds to user query text changes. - Provide suggested search topics only when the user enters a query that contains the text "products".
You need to add code to meet the requirements.
Which code segment should you insert at line 02?

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

5. You need to ensure that the settings for the About page meet the business requirements.
Which attribute should you add to the DIV element in line AB07?

A) data-win-options="{width:'narrow'}"
B) data-win-options="{size:'narrow'}"
C) data-win-options={size:'346'}"
D) data-win-options="{width:'346'}"

Solutions: