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Recertification for MCSD: Windows Store Apps using HTML5

Question No: 51 – (Topic 7)

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?

  1. Encrypt and decrypt data by using an asymmetric algorithm.

  2. Encrypt and decrypt data by using a symmetric algorithm.

  3. Encrypt data by using an asymmetric algorithm. Decrypt data by using a symmetric algorithm.

  4. Encode data to and decode data from a Base64 string.

Answer: A

Question No: 52 – (Topic 7)

You are developing a Windows Store app by using JavaScript. The app will be installed on five devices. The app will use certificates to secure communications between the five devices.

Information sent through the app must be decrypted only by the intended recipient device. You need to complete the certificate enrollment.

What should you do?

  1. Create a single certificate enrollment request on one device and import the certificate to the other four devices.

  2. Create a single group certificate enrollment request on one device and share the public and private keys with the other four devices.

  3. Create a certificate enrollment request on each device and install the respective response on each device.

  4. Create a single certificate enrollment request on one device and share only the public key with the other four devices.

Answer: C

Question No: 53 DRAG DROP – (Topic 7)

You develop a Windows Store app.

You need to implement a testing strategy for the app.

Which actions should you perform? To answer, drag the appropriate actions to the correct targets. Each answer 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.

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Answer:

Ensurepass 2018 PDF and VCE

Question No: 54 HOTSPOT – (Topic 7)

The following image depicts three apps. App1 and App3 have been launched by App2.

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Select the correct answer from each list based on the information presented in the image. Each correct selection is worth one point.

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Ensurepass 2018 PDF and VCE

Answer:

Ensurepass 2018 PDF and VCE

Explanation:

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ViewSizePreference enumeration (Windows)

Question No: 55 – (Topic 7)

You are developing an app that plays one audio file named myAudio.mp3 and two video files named myVideol.mp4 and myVideo2.mp4.

You have the following requirements:

->The audio file must NOT have access to the Play To feature.

->The video files must be able to use the Play To feature.

You need to configure the app to meet the requirements. Which code or markup segment should you use?

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  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: C

Question No: 56 DRAG DROP – (Topic 7)

You are developing a Windows Store app. The app includes an alarm clock and also displays weather information.

When the alarm activates, the app must fetch weather data, including the appropriate weather icon, from a predetermined online data source. The app must display an on-screen notification that presents data in the format shown in the following image.

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You need to implement the on-screen notification.

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.

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Answer:

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Explanation:

Configure the ToastTemplateType enumeration to display the notification by using the

toastImageAndText04 template.

Set the weather information and icon in the toast message object by using the

appendChild and setAttribute methods.

Create a notification object to contain the toast message. Display the toast message by using the show method.

Question No: 57 – (Topic 7)

You develop a Windows Store app.

You need to ensure that the app will pass certification and successfully run on Windows RT devices.

What is the best approach to achieve the goal? More than one answer choice may achieve the goal. Select the BEST answer.

  1. Test the app on an x86 development device in emulated mode by using Windows App Certification Kit for Windows RT.

  2. Test the app on a Windows RT device by using the Windows App Certification Kit for Windows RT.

  3. Register the app in the Windows Store and run the Application Verifier for Windows on the uploaded app.

  4. Test the app on an x86 development device by using the Windows App Certification Kit.

Answer: B

Question No: 58 – (Topic 7)

You are developing a Windows Store app that will be used to display daily high temperatures and other weather conditions for five cities.

The app must meet the following requirements:

->A splash screen is displayed on the device until the data is retrieved from the Internet.

->The user must be able to view weather information as soon as the data is fully

available.

You need to ensure that the splash screen is displayed at startup until the app has completed loading updated data.

Which actions can you perform to achieve this goal? (Each correct answer presents a complete solution. Choose all that apply.)

  1. Create an image that duplicates the splash screen, and display the image by using fragment loading until the data is fully available.

  2. Create an image that duplicates the splash screen, load the image from the dismissed event of the splash screen, and display the image until the data is fully available.

  3. Configure settings in the app manifest to display the splash screen until the data is fully available.

  4. Configure settings in the app manifest to display the splash screen for 10 seconds.

Answer: A,D

Explanation: Guidelines for splash screens (Windows) How to extend the splash screen (HTML) (Windows)

Question No: 59 – (Topic 7)

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?

  1. From the calling page, call the closet) command.

  2. From the calling page, call the postMessage() command with the terminate parameter.

  3. From the web worker, call the GC.Collect method.

  4. From the web worker, call the close() command.

Answer: D

Question No: 60 HOTSPOT – (Topic 7)

You are developing a Windows Store app.

You plan to use Windows Push Notification Services (WNS) in the app.

You need to identify whether the system has disabled notifications globally.

How should you complete the relevant code? (To answer, select the correct code segment from each drop-down list in the answer area.)

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Ensurepass 2018 PDF and VCE

Answer:

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