Which actions should you perform?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to ensure that only the correct information is preserved when the user switches to
another app.
Which actions should you perform? (Each correct answer presents part of the solution.
Choose all that apply.)
Which actions should you perform?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to ensure that the app resumes according to the requirements.
Which actions should you perform? (Each correct answer presents part of the solution.
Choose all that apply.)
Which method should you use?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to choose the appropriate data binding strategy for the image list box.
Which method should you use?
Which code segment should you use?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
A photo competition is ending.
You need to meet the requirements when a user clicks the toast notification.
Which code segment should you use?
which four code segments in sequence should you replace line AX23?
DRAG DROP
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to update the app tile images.
With which four code segments in sequence should you replace line AX23? (To answer,
move the appropriate code segments from the list of code segments to the answer area and
arrange them in the correct order.)
Which class should you use?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to identify the class to use as the data context for the image list box.
Which class should you use?
Which code segments should you insert at line AX24?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to correctly display notifications on the app tile.
Which code segments should you insert at line AX24? (Each correct answer presents part of the solution. Choose all that apply.)
which ApplicationExecutionState enumeration should you configure the user interface state?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to ensure that resuming the app displays the required information.
From which ApplicationExecutionState enumeration should you configure the user interface
state?
Which data storage methods should you use?
###BeginCaseStudy###
Case Study: 1
Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition is
almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
• Run the app on a variety of devices, including devices that have limited bandwidth
connections.
• Share and synchronize high resolution photographs that are greater than 1 MB in size.
• Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
• Retain state for each user and each device.
• Restore previously saved state each time the app is launched.
• Preserve user state and photo edits when switching between this app and other apps.
• When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
• Update the image list box as new images are added to the image file list.
• Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
• Regularly update the app tile with random images from the user’s collection
displayed one at a time.
• When a photo is displayed on the tile, one of the following badges must be displayed:
• If the photo has a user rating, the tile must display the average user rating as a badge.
• If the photo does not have a rating, the tile must display the Unavailable glyph as a badge.
• Update the app tile in real time when the app receives a notification.
• Display only the most recent notification on the app tile.
The app must display toast notifications to signal the end of a photo competition. The toast
notifications must meet the following requirements:
• Display toast notifications based on the schedule that is received from the web service.
• Display toast notifications for as long as possible.
• Display toast notifications regardless of whether the app is running.
• When a user clicks a toast notification that indicates the end of the photo
competition, the app must display the details of the photo competition that triggered
the toast notification.
###EndCaseStudy###
You need to access the remote image data according to the requirements.
Which data storage methods should you use?
Which code segments should you insert at line CS42?
###BeginCaseStudy###
Case Study: 2
Scenario 2
Background
You are developing a Windows Store app named Picture Sharer. The app will allow users to
capture, modify, caption, and share pictures.
Application Structure
The SharelmageButton and GetContactsButton controls use the same foreground color. The
foreground color might change in the future.
The following code defines a custom button style named ButtonStyleRed:
<code>
<Style TargecType=”Buccon” x:Key=”ButconScyleRed”>
<Setcer Property=”Foreground” Value=”#FFC34343,’/>
<Setter Property—’Border3rushn Value—,#FFC34343″/>
…
</Style>
</code>
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must meet the following business requirements:
• Allow users to capture and retrieve pictures, modify pictures by adding a shading
effect, and add captions to images.
• Support only Landscape and Landscape-flipped orientations.
• Ensure that users can select and modify imaqes from the PictureChooserPaqe page.
• Ensure that users can change the magnification of the selected image and resize the
image by using pinch and stretch gestures. Scaling should be fluid and precisely
controlled by the user.
The app must be localized for the French Canadian market.
Technical Requirements
The app must meet the following technical requirements:
• Scroll bars must not be visible.
• The CaptionTextBlock and CaptionTextBox controls must appear side by side,
without overlapping and on the same line. The CaptionTextBox control should
appear to the right of the CaptionTextBlock control.
• The ContactPicker object must be filtered to display only email addresses.
• Minimize the code that is required to implement optical zoom functionality.
You must perform the following tasks:
• Handle the Click event of the GetPictureButton control to switch from the current
page to the PictureChooserPage page.
• After the user selects an image on the PictureChooserPage page, ensure that the app
navigates back to the PictureSharerMainPage page.
• Track the current screen orientation and page size by updating the
_currentViewState, _currentHeight, and _currentWidth fields every time the screen
orientation or page size changes.
• Create a style named ButtonStyleWhite that inherits all the style settings of the
ButtonStyleRed style except the border color; the border color must be white. The
ButtonStyleWhite style must automatically update with any changes that are made
to the ButtonStyleRed style.
• Create a resource named ButtonForegroundColor to implement the button
foreground color so that it can be referenced in XAML by using the following
standard syntax: Foreground-“{StaticResourceButtonForegroundColor}”
• Ensure that the OnNavigatedTo() method updates the current picture when a new
picture is selected.
• Change the background for the root Grid element to a vertical gradient that
transitions from black at the top to maroon at the bottom. Create a resource named
GridBackgroundGradientBrush to hold the requested gradient.
• While testing the app, you observe the following results:
• An exception is being thrown in the GetContactsCompleted event handler when the
retrieved email address is assigned to the RecipientsTextBlock control. The exception
message states: “The application called an interface that was marshalled for a
different thread.”
• When users navigate away from the PictureSharerMainPage page, information that
was entered in the CaptionTextBox control is lost.
PictureSharerMainPage.xaml
###EndCaseStudy###
You need to enable the functionality to switch to the PictureChooserPage page.
Which code segments should you insert at line CS42? (Each correct answer presents part of
the solution Choose all that apply.)