Microsoft 70-357 Free Demo 2021

NEW QUESTION 1

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.
You must create a project for shared code.
Solution: You implement the shared code in a Shared Project. Does this meet the goal?

• A. Yes


• B. No

Answer: B

Explanation:
The .NET Framework Portable Class Library project type in Visual Studio helps you build cross-platform apps and libraries for Microsoft platforms quickly and easily.
Portable class libraries can help you reduce the time and costs of developing and testing code. Use this project type to write and build portable .NET Framework assemblies, and then reference those assemblies from apps that target multiple platforms such as Windows and Windows Phone.
Even after you create a Portable Class Library project in Visual Studio and start developing it, you can change the target platforms. Visual Studio will compile your library with the new assemblies, which helps you identify the changes you need to make in your code.
From scenario:
The app must be compatible with current and future XBOX apps that use C++.

NEW QUESTION 2

You must create a control that meets the following requirements:
• allows you to extend the behavior of a combo box allows the arrow image is located at the right edge of a standard control to be replaced with a new image
• has a property that sets and returns the image
•has a visual interface of the control that is defined by using XAML
•defines the properties for the control in code You need to create the control.
Which object should you use?

• A. ContentDialog


• B. StaticResource


• C. ThemeResource


• D. UserControl

Answer: A

Explanation:
ContentDialog represents a dialog box that can be customized to contain checkboxes, hyperlinks, buttons and any other XAML content.

NEW QUESTION 3
DRAG DROP
You need to add code at line IM14 to meet the user interface requirement.
How should you complete the relevant code segment? To answer, drag the appropriate code segments to the correct location or locations. Each code segments 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.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
Box 1: RunAsync
Box 2: CoreDispatcherPriority
Box 3: Normal
If you are on a worker thread and want to schedule work on the UI thread, use CoreDispatcher::RunAsync. Always set the priority to CoreDispatcherPriority::Normal or CoreDispatcherPriority::Low.
Callbacks scheduled with CoreDispatcherPriority::Low priority are called when there are no pending input events. Use the CoreDispatcherPriority::Low priority to make your app UI more responsive.

NEW QUESTION 4
HOTSPOT
You have an app that includes the following method:

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
Box 1: No
When neither DesiredAccuracyInMeters nor DesiredAccuracy are set, your app will use an accuracy setting of 500 meters (which corresponds to the DesiredAccuracy setting of Default). Setting DesiredAccuracy to Default or High indirectly sets DesiredAccuracyInMeters to 500 or 10 meters, respectively.
Box 2: No
The Default value should be used to optimize for power, performance, and other cost
considerations.
The High value should be used to deliver the most accurate report possible. This includes using services that might charge money, or consuming higher levels of battery power or connection bandwidth. An accuracy level of High may degrade system performance and should be used only when necessary.

NEW QUESTION 5

You are developing a Universal Windows Platform (UWP) app that uses XAML and C#. The app must use the Model-View-ViewModel (MVVM) pattern.
The user interface (UI) triggers an event.
You need to bind the event to a view model method. What should you do?

• A. Create a custom behavior and attach the behavior to the UI elemen


• B. Bind the behavior’s event trigger to the command declared in the view model.


• C. Create an attached property of type IComman


• D. Bind the UI element’s event to the attached property.


• E. Assign the value of the DataContext property to the view mode


• F. Use the BindingExression.UpdateSource() method to update the data source.


• G. Add a strongly-typed view model property to the vie


• H. In the code behind file for the view, invoke the view model method.

Answer: B

Explanation:
Commands are an implementation of the ICommand interface that is part of the .NET Framework. This interface is used a lot in MVVM applications.

NEW QUESTION 6
DRAG DROP
You need to create the user interface for the timeline.
Which four markup segments should you use to develop the solution? To answer, move the appropriate markup segments from the list of markup segments to the answer area and arrange them in the correct order.
NOTE: More than one order of answer choices is correct. You will receive credit for any of the correct orders you select.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
Box 1: <Commandbar>
Command bars (also called "app bars") provide users with easy access to your app's most common tasks, and can be used to show commands or options that are specific to the user's context, such as a photo selection or drawing mode. They can also be used for navigation among app pages or between app sections. Command bars can be used with any navigation pattern.
XAML provides both the AppBar control and the CommandBar control. You should use the AppBar only when you are upgrading a Universal Windows 8 app that uses the AppBar, and need to minimize changes. For new apps in Windows 10, we recommend using the CommandBar control instead.
Box 2: <AppBarButton .. etc.
The CommandBar control is a general-purpose, flexible, light-weight control that can display both complex content, such as images or text blocks, as well as simple commands such as AppBarButton, AppBarToggleButton, and AppBarSeparator controls.
Box 3: <CommandBar.SecondaryCommands> etc.
The overflow menu is shown only when the command bar is open and the SecondaryCommands property is populated. The new dynamic overflow behavior will automatically move primary commands into the SecondaryCommands area when space is limited.
Box 4: </Commandbar>
Example: Here is a same command bar in its open state. The labels identify the main parts of the control.

This example creates the command bar shown above.
<CommandBar>
<AppBarToggleButton Icon="Shuffle" Label="Shuffle" Click="AppBarButton_Click" />
<AppBarToggleButton Icon="RepeatAll" Label="Repeat" Click="AppBarButton_Click"/>
<AppBarSeparator/>
<AppBarButton Icon="Back" Label="Back" Click="AppBarButton_Click"/>
<AppBarButton Icon="Stop" Label="Stop" Click="AppBarButton_Click"/>
<AppBarButton Icon="Play" Label="Play" Click="AppBarButton_Click"/>
<AppBarButton Icon="Forward" Label="Forward" Click="AppBarButton_Click"/>
<CommandBar.SecondaryCommands>
<AppBarButton Icon="Like" Label="Like" Click="AppBarButton_Click"/>
<AppBarButton Icon="Dislike" Label="Dislike" Click="AppBarButton_Click"/>
</CommandBar.SecondaryCommands>
<CommandBar.Content>
<TextBlock Text="Now playing..." Margin="12,14"/>
</CommandBar.Content>
</CommandBar>

NEW QUESTION 7

Note: This question is part of a series of questions that present the same scenario. Each
question in the series contains n unique solution. Determine whether the solution meets the stated goals.
You need to implement the appropriate XAML layout for the Timeline app. Solution: You create an instance of a SplitView control.
Does this meet the goal?

• A. Yes


• B. No

Answer: B

Explanation:
A split view control has an expandable/collapsible pane and a content area. Here is an example of the Microsoft Edge app using SplitView to show its Hub.

NEW QUESTION 8
HOTSPOT
You need to properly handle the size of the user interface objects.
How should you complete the method? To answer, select the appropriate code segment from each list in the answer area.
NOTE: Each correct selection is worth one point.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
From scenario:
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.
Box 1: MouseCapabilities pd = new Windows.Devices.Input.MouseCapabilities();
The Windows.Devices.Input namespace contains the MouseCapabilities class used to retrieve the properties exposed by one or more connected mice. Just create a new MouseCapabilities object and get the properties you're interested in.
Box 2: int pointer = pd.MousePresent; Example:
MouseCapabilities mouseCapabilities = new Windows.Devices.Input.MouseCapabilities(); MousePresent.Text = mouseCapabilities.MousePresent != 0 ? "Yes" : "No";
Box 3: if (pointer == 1)
This is true if a mouse is present.

NEW QUESTION 9

Note: This question it part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.
You are developing a Universal Windows Platform (UWP) app. Your app stores files on a user's device.
You need to be able to replace the existing files with new files generated by the user.
Solution you run the StoragaFile.GetParentAsync method to get a reference to the existing file. Then, you run the StorageFile.CreateStreamedFileAsyne method to create the- new file at that same location.
Does this meet the goal?

• A. yes


• B. No

Answer: A

Explanation:
The GetParentAsync() method gets the parent folder of the current file. The CreateStreamedFileAsync method can be used to create a StorageFile that can be passed to other methods or passed to another app through app contracts.

NEW QUESTION 10
DRAG DROP
You are building a Universal Windows Platform (UWP) app that displays a list of books.
The books will be displayed in a ListView control. You are binding to a collection of type BookDataGroup.
You need to create a DataTempate for your ListView that displays the book’s title and author. The title must be displayed before the author.
Which four markup segments should you use to develop the solution? To answer, move
the appropriate markup segments from the list of markup segments to the answer area and arrange them in the correct order.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 11

You are developing a Universal Windows Platform (UWP) a pp.
The app must be available on Windows Phone, Windows tablet devices, and Xbox.
When the app is running on a device, you need to determine which members of a specific class you can use.
Which of the following methods should you use?

• A. ApiInformation.IsPropertyPresent


• B. UserInformation.NameAccessAllowed


• C. Selector.GetIsSelectionActive


• D. AppExtensionCatalog.FindAllAsync

Answer: D

Explanation:
The AppExtensionCatalog class represents a device. This class allows access to well- known device properties as well as additional properties specified during device enumeration.
A Successful completion of FindAllAsync results in a DeviceInformationCollection containing DeviceInformation objects.

NEW QUESTION 12

Note: This question is part of a series of questions that present the same scenario. Each
question in the series contains a unique solution. Determine whether the solution meets the stated goals.
You must create a project for shared code.
Solution: You implement the shared code in a Windows Runtime component. Does this meet the goal?

• A. Yes


• B. No

Answer: A

NEW QUESTION 13
HOTSPOT
You must evaluate the code in CredentialManager.cs.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
Box 1: No
Box 2: Yes
Box 3: No
From scenario: the following code was used PassWordVault vault = new PasswordVault(); var credential = vault.RetrieveAll();
You have several options for retrieving user credentials from the Credential Locker after you have a reference to the PasswordVault object.
You can, as in this question, retrieve all the credentials the user has supplied for your app in the locker with the PasswordVault.RetrieveAll method.

NEW QUESTION 14
HOTSPOT
You are reviewing the App_BackRequested method in the MainPage.xaml.cs file.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
Box 1: No
If we assume that the client is a PC, then the back button is not available in tablet mode.
Box 2: Yes
If we assume that the client is a PC, then the back button is available in desktop mode.
Box 3: No
The user cannot go back from the first item on the timeline. Box 4: No
From scenario: The Back and Forward buttons navigate through the app selection history. Both buttons must be available on all devices.

NEW QUESTION 15

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.

• A. Enter the package family name of the Catalog app in the Catalog app.


• B. Add a Windows Runtime component to the Catalog app.


• C. Enter the package family name of the Catalog app in the Research app.


• D. Add an app service extension to package.appmanifest file in the Research app.


• E. Add a Windows Runtime component to the Research app.


• F. Add an app service extension to package.appmanifest file in the Catalog app.

Answer: BCF

Explanation:
F: Example: Add an app service extension to package.appxmanifest
In the AppServiceProvider project's Package.appxmanifest file, add the following AppService extension to the <Application> element. This example advertises the com.Microsoft.Inventory service and is what identifies this app as an app service provider. The actual service will be implemented as a background task. The app service app exposes the service to other apps
B: Create the app service
An app service is implemented as a background task. This enables a foreground application to invoke an app service in another application to perform tasks behind the scenes. Add a new Windows Runtime Component project to the solution.
C: Deploy the service app and get the package family name
The app service provider app must be deployed before you can call it from a client. You will also need the package family name of the app service app in order to call it.

NEW QUESTION 16
HOTSPOT
You are developing a Universal Windows Platform (UWP) app by using XAML and C#. A team member has written a XAML page that includes a button with an event handler method named ButtonSendNotification_Click() registered to the Click event.
You are reviewing the following code segment written by the team member (line numbers are added for reference only):

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each selection is worth one point.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
Box 1: No
There are four tile sizes: small, medium, wide, large. Only three are reference in the TileNofitication definition.
Box 2: Yes
Box 3: No
Box 4: No
Line 42 is doc.LoadXml(xml);
The LoadXml method loads an XML document from a string. Returns TRUE on success or FALSE on failure.
If called statically, returns a DOMDocument or FALSE on failure.
If an empty string is passed as the source, a warning will be generated. This warning is not generated by libxml and cannot be handled using libxml's error handling functions.

NEW QUESTION 17

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.
You must create a project for shared code.
Solution: You implement the shared code in a Class Library (Universal Windows). Does this meet the goal?

• A. Yes


• B. No

Answer: A

Explanation:
The .NET Framework Portable Class Library project type in Visual Studio helps you build cross-platform apps and libraries for Microsoft platforms quickly and easily.
Portable class libraries can help you reduce the time and costs of developing and testing code. Use this project type to write and build portable .NET Framework assemblies, and then reference those assemblies from apps that target multiple platforms such as Windows and Windows Phone.
Even after you create a Portable Class Library project in Visual Studio and start developing it, you can change the target platforms. Visual Studio will compile your library with the new assemblies, which helps you identify the changes you need to make in your code.
From scenario:
The app must be compatible with current and future XBOX apps that use C++.

NEW QUESTION 18

Note: This question is part of a series of questions that present the same scenario. Each
question in the series contains n unique solution. Determine whether the solution meets the stated goals.
You need to implement the appropriate XAML layout for the Timeline app. Solution: You create an instance of a StackPanel class.
Does this meet the goal?

• A. Yes


• B. No

Answer: B

Explanation:
StackPanel is a simple layout panel that arranges its child elements into a single line that can be oriented horizontally or vertically. StackPanel controls are typically used in scenarios where you want to arrange a small subsection of the UI on your page.
The following XAML shows how to create a vertical StackPanel of items. XAML
<StackPanel>
<Rectangle Fill="Red" Height="44"/>
<Rectangle Fill="Blue" Height="44"/>
<Rectangle Fill="Green" Height="44"/>
<Rectangle Fill="Orange" Height="44"/>
</StackPanel>
The result looks like this.

NEW QUESTION 19

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.

• A. Evaluate the CurrentPoint.Properties.MouseWheelDelta property of the PointerEvenArgs objec


• B. Call the ChangeView() method of the ScrollViewer.


• C. Update the XAML of the ScrollViewer to include the PointerWheelChanged event with a new event handle


• D. Evaluate the Pointer.IsInRange property of the PointerRoutedEventArgs object within the event handle


• E. Call the ChangeView() method of the ScrollViewer.


• F. Add an event handler to the PointerRoutedAway event for the current window.


• G. Evaluate the CurrentPoint.Properties.IsHorizontalMouseWheel property of the PointerEventArgs objec


• H. Call the ChangeView() method of the ScrollViewer.


• I. Add an event handler to the PointerWheelChanged event for the current window.

Answer: CD

Explanation:
The PointerRoutedAway event occurs on the process receiving input when the pointer input is routed to another process.

NEW QUESTION 20

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains n unique solution. Determine whether the solution meets the stated goals.
You need to implement the appropriate XAML layout (or the Timeline app. Solution: You create an instance of a RelativePanel class.
Does this meet the goal?

• A. Yes


• B. No

Answer: A

Explanation:
RelativePanel lets you layout UI elements by specifying where they go in relation to other elements and in relation to the panel. By default, an element is positioned in the upper left corner of the panel.

NEW QUESTION 21
HOTSPOT
You are developing an app that displays photos.
You need to create a method that displays informational text when a user hovers the pointer over a photo.
How should you complete the method? To answer, select the appropriate code segment from each list in the answer area.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:
Box 1: DependencyObject
Box 2: String
Box 3: ToolTip
Box 4: ToolTip
Box 5: ToolTipService
A ToolTip must be assigned to another UI element that is its owner. In Extensible Application Markup Language (XAML), use the ToolTipService.Tooltip attached property to assign the ToolTip to an owner. In code, use the ToolTipService.SetToolTip method to assign the ToolTip to an owner.
The SetToolTip(DependencyObject, Object) method sets the value of the ToolTipService.ToolTip XAML attached property.

NEW QUESTION 22
HOTSPOT
You are developing a Universal Windows Platform (UWP) app that plays audio recordings.
You are creating a page where the user can set a volume level for the app using a slider control. You need to display the volume level in a TextBox right below the slider. You have C# class named VolumeConverter that converts slider values to a number.
You have a page that includes the following markup:

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

• A. Mastered


• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 23
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