Microsoft 70-357 Exam Practice Test Instant Access

Question 1

You need to configure networking.

Which two networking technologies should you use? Each correct answer presents a complete solution.

ABackground Transfer API

BStreamWebSocket class

CHttpClient class

DCustom WebSocket class

EMessageWebSocket class

Answer : A, C

Question 2

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?

ACreate a custom behavior and attach the behavior to the UI element. Bind the behavior's event trigger to the command declared in the view model.

BCreate an attached property of type ICommand. Bind the UI element's event to the attached property.

CAssign the value of the DataContext property to the view model. Use the BindingExression.UpdateSource() method to update the data source.

DAdd a strongly-typed view model property to the view. In the code behind file for the view, invoke the view model method.

Answer : B

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

Question 3

You need to design the navigation tor the timeline.

What navigation should you use?

Ahierarchy

Bpeer

Chub

Dmaster/details

Answer : A

From scenario:

Here we can use a hierarchy with each parent node having only one single child node.

Hierarchical structures are good for organizing complex content that spans lots of pages or when pages should be viewed in a particular order. The downside is that hierarchical pages introduce some navigation overhead: the deeper the structure, the more clicks it takes for users to get from page to page.

We recommend a hiearchical structure when:

You expect the user to traverse the pages in a specific order. Arrange the hierarchy to enforce that order.

There is a clear parent-child relationship between one of the pages and the other pages in the group.

There are more than 7 pages in the group.

When there are more than 7 pages in the group, it might be difficult for users to understand how the pages are unique or to understand their current location within the group. If you don't think that's an issue for your app, go ahead and make the pages peers

Question 4

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?

Ayes

BNo

Answer : A

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.

Question 5

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?

AYes

BNo

Answer : B

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.

Question 6

You are designing a roadside assistance mobile app. The app displays a persistent list of links to pages. The app displays a persistent list of links to pages. The pages provide a quick way to move between different views of the a pp.

You need to recommend a user interface pattern that meets the following requirements:

* Allow users to navigate to frequently accessed, distinct content categories,

* Provide two or more content pones that have corresponding category headers.

* Display the navigation controls on the top of the screen.

* Highlight the currently selected navigation control.

Which pattern should you recommend?

Ahub

Btabs and pivots

Cactive canvas

Dmaster/details

Answer : B

The Pivot control and related tabs pattern are used for navigating frequently accessed, distinct content categories. Pivots allow for navigation between two or more content panes and relies on text headers to articulate the different sections of content.

Tabs are a visual variant of Pivot that use a combination of icons and text or just icons to articulate section content. Tabs are built using the Pivot control.

Question 7

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.

AEnter the package family name of the Catalog app in the Catalog app.

BAdd a Windows Runtime component to the Catalog app.

CEnter the package family name of the Catalog app in the Research app.

DAdd an app service extension to package.appmanifest file in the Research app.

EAdd a Windows Runtime component to the Research app.

FAdd an app service extension to package.appmanifest file in the Catalog app.

Answer : B, C, F

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.

Microsoft Developing Mobile Apps 70-357 Exam Practice Test