You are developing a Windows Presentation Foundation (WPF) application that plays video clips.
The markup is as follows.

You need to ensure that the current running time of the video is automatically updated and displayed in CurrentRunTime.
What should you do?

• A. Register for the myMediaTimeline Changed event and add the following line in the event handler. CurrentRunTime.Text = myMediaElement.Clock.ToString();
• B. Register for the myMediaTimeline Changed event and add the following line in the event handler. CurrentRunTime.Text = myMediaElement.Position.ToString();
• C. Register for the myMediaTimeline CurrentTimelnvalidated event and add the following line in the event handler. CurrentRunTime.Text = myMediaElement.Clock.ToString();
• D. Register for the myMediaTimeline CurrentTimelnvalidated event and add the following line in the event handler. CurrentRunTime.Text = myMediaElement.Position.ToString();

You are developing a Windows Presentation Foundation (WPF) application by using
Microsoft Visual Studio 2010.
While testing the application, you discover that a control is not positioned properly within a
canvas.
You need to view the Dependency properties of the control at run time. Which tool should you use?

• A. Watch List
• B. Disassembly Window
• C. WPF Tree Visualizer
• D. Locals List

You are developing a Windows Presentation Foundation (WPF) application.
You are implementing the security features for a function that requires File 10. The callers of this function that are higher in the stack do not have permission to read the C:\temp directory. The function also accesses other resources that require permission.
You need to ensure that the function has the proper permissions to read the C:\temp directory, and that all other resources in the function can still be accessed.
Which attribute should you include with the function?

• A. <FileIOPermissionAttribute(
  SecurityAction.InheritanceDemand, Read:="C:\TEMP")>
• B. <FileIOPeritiissionAttribute ( SecurityAction.Demand, Read:="C:\TEMP")>
• C. <FileIOPermissionAttribute( SecurityAction.Assert, Read:= "C:\TEMP")>
• D. <FileIOPermissionAttribute( SecurityAction.PermitOnly, Read:="C:\TEMP")>

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
You plan to allow users to customize the background colors, foreground colors, and font style of the application. You also plan to add a TextBlock control to the application.
You write the following code fragment. (Line numbers are included for reference only.)

You need to ensure that the ContextMenu control is associated with the TextBlock control. You also need to ensure that the properties that can be customized are shown hierarchically.
Which code fragment should you insert at line 15?

• A. < Window.ContextMenu >
  < ContextMenu >
  < MenuItem Header="Color Scheme" DataContext="{StaticResource colorschemes)"
  ItemsSource="{ Binding Path ItemTemplate="{StaticRes ource StringTemplate}" />
  < MenuItern Header="Font" DataContext="{ StaticResource fonts!" ItemsSource=,,{
  Binding Path=.}" ItemTemplate="{StaticResource StringTemplate}" />
  < /ContextMenu >
  < /Window.ContextMenu >
• B. < Grid >
  <TextBlock Width="200" Height="100" Background="LightBlue" >
  < TextBlock.ContextMenu >
  < ContextMenu >
  < MenuItem Header="Color Scheme" DataContext="{StaticResource colorschemes)"
  ItemsSource="{Binding Path=.) ItemTemplate="{StaticResource ColorSchemeTemplate}" /
  >
  < MenuItem Header="Font" DataContext="{StaticResource fonts)" ItemsSource="{Binding
  Path=.}" ItemTemplate="{StaticResource StringTemplate}" >< /MenuItem >
  </ContextMenu >
  < /TextBlock.ContextMenu >
  < /TextBlock ></Grid >
• C. < Grid >
  < TextBlock TJidth="200" Height= "100" Background="LightBlue" / ></Grid >
  < Window. ContextMenu >
  < ContextMenu>
  < TextBlock Width="200" Height="100" Background="LightBlue" / >
  < MenuItem Header="Color Scheme" DataContext="{StaticResource colorschemes}"
  ItemsSource="{Binding Path*.}" ItemTemplate="{StaticResource ColorSchemeTemplate}"
  />
  < MenuItem Header="Font" DataContext="{StaticResource fonts}" ItemsSource="{Binding
  Path=.}" ItemTemplate="{StaticResource StringTemplate}" >< /MenuItem >
  < /ContextMenu >
  </Window.ContextMenu >
• D. < Grid >
  < Menu >
  < MenuItem Header="Color Scheme" DataContext="{StaticResource colorschemes}"
  ItemsSource="{Binding Path=.}" ItemTemplate="{StaticResource StringTemplate}" / >
  < MenuItem Header="Font" DataContext="{StaticResource fonts}" ItemsSource="{Binding
  Path=.}" ItemTemplate="{StaticResource StringTemplate}" />
  < /Menu>
  < TextBlock width-"200" Height-"100" Background-"LightBlue" / ></Grid >

You are developing a Windows Presentation Foundation (WPF) application that displays opportunities from List<T> named Leads, where T is a class named Lead. The Lead class contains the properties Title and Revenue.
You add a DataGrid control named dgQualifiedLeads to the MainWindow.xaml file. You set the ItemSource property of dgQualifiedLeads to Leads as follows. (Line numbers are included for reference only.)

You need to ensure that CollectionViewSource is used to filter the list to display only Lead objects with revenue of more than $1,000.
What should you do?

• A. Option D
• B. Option A
• C. Option C
• D. Option B