Case Study - This is a case study. Case studies are not limited separately. You can use as much exam time as you would like to complete each case. However, there may be additional case studies and sections on this exam. You must manage your time to ensure that you are able to complete all questions included on this exam in the time provided. To answer the questions included in a case study, you will need to reference information that is provided in the case study. Case studies might contain exhibits and other resources that provide more information about the scenario that is described in the case study. Each question is independent of the other question on this case study. At the end of this case study, a review screen will appear. This screen allows you to review your answers and to make changes before you move to the next sections of the exam. After you begin a new section, you cannot return to this section. To start the case study - To display the first question on this case study, click the Next button. Use the buttons in the left pane to explore the content of the case study before you answer the questions. Clicking these buttons displays information such as business requirements, existing environment, and problem statements. If the case study has an All Information tab, note that the information displayed is identical to the information displayed on the subsequent tabs. When you are ready to answer a question, click the Question button to return to the question. Background - You are developing an application named Timeline that presents information on a timeline. The app allows users to create items and enter details about the item. The app displays item names on a timeline. When users select an item name on the timeline, the app displays additional content about the item. Business requirements - Timeline section - The timeline element of the app has the following layout requirements: The timeline must adapt to the screen size and orientation of the device. The timeline size must dynamically change if the window containing the content is resized by the user. The user must be able to scroll through the timeline horizontally when the device is in landscape mode. The user must be able to scroll through the timeline vertically when the device is in portrait mode. The timeline must begin scrolling as soon as a scroll is detected. Scrolling must continue for a short distance after the scroll input has stopped. Scroll bars or panning controls must always be visible. The following image depicts the layout for the timeline section of the app when the device is using landscape orientation: The following image depicts the layout for the timeline section of the app when the device is using portrait orientation: Content section - The content element of the app has the following layout requirements: When a user selects an item on the timeline, the details for that item must display beneath or to the right of the timeline. The content section must display one page of information. The element must be a child of the selected item in the timeline. Users must be able to return to a previously selected event by pressing the Back button. User interface - The user must be able to navigate the application using the interface below: The Favorite button marks the current content to be displayed in a Favorites panel. The Back and Forward buttons navigate through the app selection history. Both buttons must be available on all devices. The Notes button allows the user to manage notes about the current content. The app must support touch, mouse, and stylus input. The app layout must automatically adapt to the screen size and orientation. Technical requirements - Layout - You identify the following layout requirements: General - All user interface (UI) elements must continuously scale when a user resizes the window. UI controls must be smaller and spaced closer together if there is a mouse or stylus available. UI controls must be larger and spaced farther apart if the device supports touch and there is no mouse or pointer available. Timeline - The timeline must be displayed in a horizontal layout when the device is in a landscape orientation or when the horizontal width is greater than the vertical height. The timeline must be displayed in a vertical layout when the device is in a portrait orientation or when the vertical height is greater than the horizontal width. Each item in the past must be linked to the next item in the future. Users must be able to scroll from past events to future events or from future events to past events. The app must only allow one level of detail to be linked to each item in the timeline. Optimization - You must optimize the app using the following guidelines: You must minimize the time it takes to display content when an item on the timeline is selected. The app must respect memory and resource constraints for all devices. XAML coding style - All code and markup must conform to the following style guidelines: Use resource dictionaries for styles that are used more than once. Limit the use of nested panels. Use built-in properties of existing panels instead of using separate style objects. Use the navigation structure that best models the data without exceeding the requirements of the app. Application structure - MainPage.xaml - Relevant portions of the app files are shown below. (Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.) Settings.xaml - Relevant portions of the app files are shown below. (Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.) ResourceDictionery.xaml - Relevant portions of the app files are shown below. (Line numbers in the code segments are included for reference only.) MainPage.xaml.cs - Relevant portions of the app files are shown below. (Line numbers in the code segments are included for reference only and include a two-character prefix that denotes the specific file to which they belong.) You need to configure the app to meet the load time requirements. What should you do?

Correct Answer: Set the value of the NavigationCacheMode property to Enabled.

You are developing a Universal Windows Platform (UWP) app. You need to provide a solution that moves the scroll bars of the ScrollViewer when a user rotates the mouse wheel. Which two actions should you perform? Each correct answer presents part of the solution.

Correct Answer: Update the XAML of the ScrollViewer to include the PointerWheelChanged event with a new event handler. Evaluate the Pointer.IsInRange property of the PointerRoutedEventArgs object within the event handler. Call the ChangeView() method of the ScrollViewer.

You have two Universal Windows Platform (UWP) apps named Catalog and Research, respectively. You need to create a service in the Catalog app that can be queried by the Research app. Which three tasks should you perform? Each correct answer presents part of the solution.

Correct Answer: Add an app service extension to package.appmanifest file in the Research app.

You have a Universal Windows Platform (UWP) app. The app has a page that includes the following XAML markup. Line numbers are included for reference only. Users report that the page takes a long time to refresh. You need to improve the load time for the page while maintaining the same layout and functionality. What should you do?

Correct Answer: Move the attributes from the BORDER element at line 02 to the GRID element at line 03. Then, remove the BORDER elements at line 02 and line 11.

You have to connect your app to an online identity provider that uses OAuth authentication protocol. The app must securely use the WebAuthenticationBroker object for authentication. You need to ensure that the app registers with the provider. Which two actions should you perform? Each correct answer presents part of the solution.

Correct Answer: Call the GetCurrentApplicationCallbackUri method.

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Developing Mobile Apps

Build powerful mobile apps across modern platforms.

4.8★★★★★(209 ratings)

15,617 studentsIntermediate

Develop practical mobile application skills using Xamarin, UWP, and cloud services. The exam prepares you to create apps that work across devices while maintaining a strong user experience and efficient data access. It is especially useful for developers moving into cross-platform and mobile-first projects. These skills help you deliver apps that reach broader audiences and support modern business needs.

What you'll learn

Create Xamarin projects- Build UWP apps- Integrate cloud services- Implement data access- Deploy to stores

70-357

Lectures1

Quizzes0

Duration30 week

Students15,617

$20.00

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