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QUESTION 81
Drag and Drop Question
You are developing a Windows Store app by using JavaScript.
The app will use the fileStream object to write text to a file.
You need to write the text to the file and ensure that the file is available to other apps.
Which five actions should you perform in sequence? (To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.)
Answer:
QUESTION 82
Drag and Drop Question
You are developing a Windows Store style app by using JavaScript.
The app will send and receive encoded information and will display the encoded information to the user in a decrypted and recognizable state.
You need to appropriately decrypt the encoded information.
How should you complete the relevant code? (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.)
Answer:
QUESTION 83
You are developing a Windows Store app.
You configure the app to allow a free trial period.
You need to prompt the user to purchase the full version of the app when the trial period expires.
What should you do?
A. Call the getAppReceiptAsync( ) method of the
Windows.ApplicationModel.Store.CurrentApp object.
B. Call the getProductReceiptAsync( ) method of the
Windows.ApplicationModel.Store.CurrentApp object and provide the app’s product ID as an
argument.
C. Call the requestProductPurchaseAsync( ) method of the
Windows.ApplicationModel.Store.CurrentApp object and provide the app’s product ID as an
argument.
D. Call the requestAppPurchaseAsync( ) method of the
Windows.ApplicationModel.Store.CurrentApp object.
Answer: B
QUESTION 84
Hotspot Question
You are designing a testing strategy for a Windows Store app by using HTML5, JavaScript, and CSS3.
You need to use testing strategies that validate for the best performance.
Which testing strategies should you select? (To answer, select the correct action from each drop-down list in the answer area.)
Answer:
QUESTION 85
Hotspot Question
You are preparing four Windows Store apps for deployment.
You test the apps by using the Windows App Certification Kit.
The results are as shown in the following table.
You need to identify which apps passed the performance test.
What is the performance test result for each app? (To answer, choose the correct test result from each drop-down list in the answer area.)
Answer:
QUESTION 86
Drag and Drop Question
You are preparing a Windows Store app that will be distributed through the Windows Store.
You install the app on a test computer that runs Windows 8.
You must run functional test cases by using the Windows App Certification Kit.
You need to test the app before you deploy it to the Windows Store.
Which four actions should you perform in sequence? (To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.)
Answer:
QUESTION 87
Drag and Drop Question
You are designing a testing strategy for a Windows Store app by using HTML5, JavaScript, and CSS3.
You need to use testing strategies that validate for the best performance.
Which testing strategies should you select? (To answer, drag the appropriate actions to the correct locations in the answer area. Each action 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.)
Answer:
QUESTION 88
Drag and Drop Question
You are developing a Windows Store app for an airline.
The app will provide current flight status information.
The app will display the flight status on the lock screen if the user grants permission.
You have the following requirements:
– Display a dialog box that requests access to the lock screen.
– Display a message that indicates whether the user has granted access to the lock screen.
You need to ensure that the requirements are met.
How should you complete the relevant code? (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.)
Answer:
QUESTION 89
Hotspot Question
You are developing a Windows Store app by using JavaScript.
The app will call a WinMD component to convert temperature.
The component exposes the following two members:
– A static variable named Fahrenheit
– A public method named GetInCelsius( ) that accepts an integer
You need to ensure that the app will display the temperature in Celsius and Fahrenheit.
How should you complete the relevant code? (To answer, select the correct code segment from each drop-down list in the answer area.)
Answer:
QUESTION 90
Hotspot Question
You are developing a Windows Store style app by using JavaScript.
The app will send and receive encoded information and will display the encoded information to the user in a decrypted and recognizable state.
You need to appropriately decrypt the encoded information.
How should you complete the relevant code? (To answer, select the correct code segment from each drop-down list in the answer area.)
Answer:
QUESTION 91
You are developing a Windows Store app by using JavaScript.
The app will be used in multiple geographic locations.
The app implements character grouping.
You need to ensure that the app can access only the first character group.
Which code segment should you use?
A. var item = new Windows.Globalization.Collation.CharacterGroupings ( ) .getAt (1);
B. var item = new Windows.Globalization.Collation.CharacterGroupings( ) .lookup(“1”);
C. var item = new Windows.Globalization.Collation.CharacterGroupings( ) .first( );
D. var item = new Windows.Globalization.Collation.CharacterGrouping( ) .first;
Answer: C
QUESTION 92
You are developing a Windows Store app by using JavaScript.
The app persists a list of stocks in the app’s settings.
The stock list is identified by a key of stockList.
The app must allow users to remove their stock lists from the app’s settings.
The following function call removes the stockList setting:
deleteAppSetting(“stockList”) ;
You need to remove only stockList from the settings storage without disrupting other settings.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
QUESTION 93
Hotspot Question
You are developing a Windows Store app by using JavaScript.
The app will be used to create video blogs.
The app uses the device’s internal camera.
The app must meet the following requirements:
– Allow the user to record audio and video.
– Save files in the .mp4 file format.
– Store files in the user’s Videos library.
You need to ensure that the app meets the requirements.
How should you complete the relevant code? (To answer, select the correct code segment from each drop-down list in the answer area.)
Answer:
QUESTION 94
You are developing a Windows Store app by using JavaScript.
The app will allow users to customize various features.
The customizations will be persisted by using the saveMySettings function
You need to persist the customizations.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
QUESTION 95
Hotspot Question
You are developing a Windows Store app by using JavaScript.
The app will be used in multiple geographic regions.
You need to ensure that the app displays dates in the region-specific full date format.
How should you complete the relevant code? (To answer, select the correct code segment from each drop-down list in the answer area.)
Answer:
QUESTION 96
Drag and Drop Question
You are developing a custom date picker control for a Windows Store app.
The control must meet the following requirements:
– Inherit from the WinJS DatePicker control.
– Provide an additional property to set if the date selection is required.
You need to ensure that the requirements are met.
How should you complete the relevant code? (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.)
Answer:
QUESTION 97
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 postMessage() command with the terminate parameter.
B. From the calling page, call the postMessage() command with the clean parameter.
C. From the web worker, call the close() command.
D. From the calling page, call the postMessage() command with the close parameter.
Answer: C
Explanation:
In Internet Explorer 10 and Windows Store apps using JavaScript, the Web Workers API supports the following method .
void close();
MethodDescription: Terminates the worker thread.
Note: Internet Explorer 10 and Windows Store apps using JavaScript introduce support for Web Workers. The Web Workers API defines a way to run scripts in the background.
QUESTION 98
Hotspot Question
You develop a Windows Store app by using JavaScript.
The app displays a list of video controls.
The user can add video controls to the list.
You need to animate the video control list when the user adds a control to the list.
How should you complete the relevant code? (To answer, select the correct code segment from each drop-down list in the answer area.)
Answer:
QUESTION 99
You develop a Windows Store app.
The app user interface is slow to load, and occasionally stops responding.
You need to increase the responsiveness of the user interface.
What should you implement?
A. Synchronous calls
B. The Web Worker API
C. The Task.Run method
D. Windows Runtime Metadata (WinMD) components
Answer: B
QUESTION 100
Hotspot Question
You are creating a Windows Store app by using JavaScript.
You need to ensure that the app can receive push notifications from a calling app.
How should you complete the relevant code? (To answer, select the appropriate method from the drop-down list in the answer area.)
Answer:
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