https://www.newpassleader.com/Microsoft/70-357-exam-preparation-materials.html

(154 Q&As Dumps, 30%OFF Special Discount: 30free)

NEW QUESTION NO: 10

HOTSPOT
You are developing a Universal Windows Platform (UWP) app that processes and displays data from your company's personnel database.
Users report that one of the views in the UWP app loads slowly.
You need to optimize the load time.
How should you complete the relevant markup? To answer, select the appropriate markup segment from each list in the answer area.
Hot Area:

Answer: 

Explanation/Reference:
Explanation:
The {x:Bind} markup extension-new for Windows 10-is an alternative to {Binding}. {x:Bind} lacks some of the features of {Binding}, but it runs in less time and less memory than {Binding} and supports better debugging.
In the following example, the background and foreground of the item are bound to functions to do conversion based on the color parameter
<DataTemplate x:DataType="local:ColorEntry">
<Grid Background="{x:Bind Brushify(Color)}" Width="240">
<TextBlock Text="{x:Bind ColorName}" Foreground="{x:Bind TextColor(Color)}" Margin="10,5" />
</Grid>
</DataTemplate>
Reference: https://docs.microsoft.com/en-us/windows/uwp/xaml-platform/x-bind-markup-extension

NEW QUESTION NO: 11
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?
A. Set the value of the CacheSize to 0.
B. Set the value of the CacheMode property to BitmapCache.
C. Set the value of the NavigationCacheMode property to Enabled.
D. Set the value of the NavigationCacheMode property to Disabled.
Answer: C
Explanation/Reference:
Explanation:
Scenario: 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.

You use the NavigationCacheMode property to specify whether a new instance of the page is created for each visit to the page or if a previously constructed instance of the page that has been saved in the cache is used for each visit.
The default value for the NavigationCacheMode property is Disabled. Set the NavigationCacheMode property to Enabled or Required when a new instance of the page is not essential for each visit. By using a cached instance of the page, you can improve the performance of your application and reduce the load on your server.
Reference: https://msdn.microsoft.com/en-us/library/system.windows.controls.page.navigationcachemode (v=vs.95).aspx

NEW QUESTION NO: 12
HOTSPOT
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 a Universal Windows Platform (UWP) app for LitWare, Inc. that will assist video artists.
The app allows artists to create videos, share videos through other mobile apps, and upload the videos through LitWare, Inc.'s web services. What helps set LitWare Inc.'s app apart from competitors is their focus on speed and performance.
Business Requirements
Support many devices
Users may have phones, tablets, or laptops. The app must support all devices with a fluid layout that

grows off-screen and adapts to each device.
Record video
Users must be able to record videos and view them in their videos library.

The app must display information about the recorded video.

Users must be able to edit the upload queue in the app.

Branding
The app must have consistent branding throughout all views.

Upload videos
The app must allow deferral and scheduling of video uploads.

Users must be able to view the status of uploaded videos.

Any videos created with this app or shared with this app must be uploaded without user interaction.

Download video
The app must have the option to automatically download videos.

Users must be able to initiate downloading of videos.

Share video
The app must allow be allowed to receive videos from other apps.

Technical Requirements
Support multiple devices
The app must support the following:
Use horizontal layout for larger screens.

User vertical layout for smaller screens.

Use one layout control per view.

The app must be compatible with current and future XBOX apps that use C++.
Uploading and downloading
The app must use a background operations to upload and download videos.

Code reuse
The app must use a common pool of XAML resources and custom controls. All custom controls must

use a consistent theme throughout the app.
You must create code that can be reused in C++, C#, JavaScript, whenever possible.

The app must call the background service to avoid duplication of code.

Security
End users must be authenticated using OAuth.

Web services must be authenticated.

Users must have the option to use single sign-on.

Recording
The app must use the microphone and webcam to support audio and video recording. In addition, the

app must support the use of the back and camera buttons, if present.
Integration
Other apps must be able to share videos with this app through a Universal Windows Platform (UWP)

app service.
Architecture and coding style
The app must follow the Model-View-ViewModel (MVVM) pattern.

The app's user interface (UI) must be optimized for performance.

The app must use compile time coding techniques over runtime.

Application structure
Package.appxmanifest
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.

BackgroundTask.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 implement the following code segment according to the requirements.
How should you complete the code? To answer, select the appropriate code segment from each list in the answer area.
Hot Area:

Answer: 

Explanation/Reference:
Explanation:
From scenario:
The app must use the microphone and webcam to support audio and video recording. In addition, the

app must support the use of the back and camera buttons, if present.
Box 1: IsTypePresent
Box 2: Windows.Phone.UI.Input.HardwareButtons
Here is an example. We'll assume our app wants to take advantage of a Mobile device's dedicated camera button. If I directly referenced the HardwareButtons object for the CameraPressed event while on a desktop without checking that HardwareButtons is present, my app would crash.
// Note: Cache the value instead of querying it more than once.
bool isHardwareButtonsAPIPresent
Windows.Foundation.Metadata.ApiInformation.IsTypePresent
("Windows.Phone.UI.Input.HardwareButtons");
Reference: https://blogs.windows.com/buildingapps/2015/09/15/dynamically-detecting-features-with-api- contracts-10-by-10/

NEW QUESTION NO: 13
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?
A. 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.
B. Replace the TEXTBLOCK element at line 09 with a TEXTBOX element.
C. Swap the markup at line 02 with the markup at line 03. Swap the markup at line 10 with the markup at line 11.
D. Move the Fill and Opacity attributes and value from the RECTANGLE element at line 08 to the GRID element at line 03. Then, Remove the RECTANGLE element.
Answer: D
Explanation/Reference:
Explanation:
Use single-cell grids for overlapping UI
A common UI requirement is to have a layout where elements overlap each other. Typically padding, margins, alignments, and transforms are used to position the elements this way. The XAML Grid control is optimized to improve layout performance for elements that overlap.
Reference: https://docs.microsoft.com/en-us/windows/uwp/debug-test-perf/optimize-your-xaml-layout

NEW QUESTION NO: 14
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.
Hot Area:

Answer: 

Explanation/Reference:
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.
Reference: https://docs.microsoft.com/en-us/windows/uwp/controls-and-patterns/tiles-and-notifications- app-assets

NEW QUESTION NO: 15
DRAG DROP
You are developing a Universal Windows Platform (UWP) app.
The app has the following requirements:
Users must be able to authenticate with the app by using a third-party OAuth provider.

User must have the option of using Single Sign-On.

You obtain the security identifier (SID) for the app from the Windows Dev Center.
You need to implement authentication for the app.
In which order should you perform the actions? To answer, move all actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:

Answer: 

Explanation/Reference:
Explanation:
Step 1: Register your app with your online provider
You must register your app with the online identity provider to which you want to connect. You can find out how to register your app from the identity provider. After registering, the online provider typically gives you an Id or secret key for your app.
Step 2: Build the authentication request URI
The request URI consists of the address where you send the authentication request to your online provider appended with other required information, such as an app ID or secret, a redirect URI where the user is sent after completing authentication, and the expected response type. You can find out from your provider what parameters are required.
Step 3-4: Connect to the online provider
You call the AuthenticateAsync method to connect to the online identity provider and get an access token.
The method takes the URI constructed in the previous step as the requestUri parameter, and a URI to which you want the user to be redirected as the callbackUri parameter.
Note: Step 5: Connecting with single sign-on (SSO).
By default, Web authentication broker does not allow cookies to persist. Because of this, even if the app user indicates that they want to stay logged in (for example, by selecting a check box in the provider's login dialog), they will have to login each time they want to access resources for that provider. To login with SSO, your online identity provider must have enabled SSO for Web authentication broker, and your app must call the overload of AuthenticateAsync that does not take a callbackUri parameter. This will allow persisted cookies to be stored by the web authentication broker, so that future authentication calls by the same app will not require repeated sign-in by the user (the user is effectively "logged in" until the access token expires).

Reference: https://docs.microsoft.com/en-us/windows/uwp/security/web-authentication-broker

https://www.newpassleader.com/Microsoft/70-357-exam-preparation-materials.html