Microsoft 70-490 : Recertification for MCSD: Windows Store Apps using HTML5

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

2. DRAG DROP
You develop a Windows Store app that uses several new user interface features.
You need to declare capabilities in the application manifest so that you can submit the app to the Windows Store.
How should you complete the relevant markup? (To answer, drag the appropriate markup segments to the correct locations in the answer area. Each markup 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.)

3. You are developing two Windows Store apps by using JavaScript. A Source app will store sensitive customer information. A Target app will retrieve the stored information for validation and further processing.
The Source app must secure data by using a private-public key pair. Only the Target app must be able to consume data that has been secured by the Source app.
You need to ensure that the security of the data is not compromised.
What should you do?

A) Encode data to and decode data from a Base64 string.
B) Encrypt and decrypt data by using an asymmetric algorithm.
C) Encrypt data by using an asymmetric algorithm. Decrypt data by using a symmetric algorithm.
D) Encrypt and decrypt data by using a symmetric algorithm.

4. You need to test connection reliability.
What should you do?

A) Display the status of the tap gesture after the Start event. Test wireless connections by calling the ConnectAsync method.
B) Display the status of the tap gesture after the TriggeredConnectionStateChanged event. Test wireless connections by calling the ConnectAsync method.
C) Display the status of the tap gesture after the TriggeredConnectionStateChanged event. Test wireless connections by calling the FindAllPeersAsync method.
D) Display the status of the tap gesture after the Start event. Test wireless connections by calling the FindAllPeersAsync method.

5. You need to ensure that the PrintNearMeCall function meets the technical requirements. Which code segment should you insert at line PS24?

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

Solutions: