Dernières Microsoft 070-506-VB MB6-822 examen pratique questions et réponses

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Code d'Examen: 070-506-VB
Nom d'Examen: Microsoft (TS: Microsoft Silverlight 4, Development)
Questions et réponses: 75 Q&As

Code d'Examen: MB6-822
Nom d'Examen: Microsoft (AX 2009 Production)
Questions et réponses: 87 Q&As

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NO.1 You are developing a Silverlight 4 application.
The application contains an XAML page that defines the following Grid control.
<Grid Name="gridBody" >
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<TextBlock Text="Employee Info" />
<TextBlock Text="Please enter employee info" Grid.Row="1" Height="20" VerticalAlignment="Top" />
<TextBox x:Name="EmpInfo" Grid.Row="1" Margin="0,25,0,0" TextWrapping="Wrap" />
...
</Grid>
The code-behind file for myPage.xaml contains the following code segment. (Line numbers are included
for reference only.)
01 Public Sub New()
02 InitializeComponent()
03
04 Dim control As UserControl = New MyCustomControl()
05
06 End Sub
You need to replace the contents of the second row of gridBody with a user control of the
MyCustomControl type.
Which code segment should you insert at line 05?
A. gridBody.Children.Insert(1, control)
B. gridBody.RowDefinitions.Remove(gridBody.RowDefinitions(1))
gridBody.Children.Insert(1, control)
C. gridBody.RowDefinitions.Remove(gridBody.RowDefinitions(1))
gridBody.Children.Insert(1, control)
gridBody.Children.Clear()
Grid.SetRow(control, 1)
gridBody.Children.Add(control)
D. gridBody.RowDefinitions.Remove(gridBody.RowDefinitions(1))
gridBody.Children.Insert(1, control)
gridBody.Children.Clear()
Grid.SetRow(control, 1)
gridBody.Children.Add(control)
Answer: D

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NO.2 You are developing a Silverlight 4 application.
You define the visual behavior of a custom control in the ControlTemplate by defining a VisualState object
named Selected.
You need to change the visual state of the custom control to the Selected state.
Which code segment or XAML fragment should you use?
A. VisualStateManager.GoToState(Me, "Selected", True)
B. <VisualTransition To="Selected">
<Storyboard>
...
</Storyboard>
</VisualTransition>
C. <VisualTransition From="Selected">
<Storyboard>
...
</Storyboard>
</VisualTransition>
D. Public Shared ReadOnly SelectedProperty As DependencyProperty =
DependencyProperty.Register("Selected", GetType(VisualState), GetType(MyControl), Nothing)
Public Property Selected As VisualState
Get
Return GetValue(SelectedProperty)
End Get
Set(ByVal value As VisualState)
SetValue(SelectedProperty, value)
End Set
End Property
Answer: A

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NO.3 You are developing an application by using Silverlight 4 and Microsoft .NET Framework 4.
The application contains the following XAML fragment.
<TextBlock x:Name="QuoteOfTheDay" />
The application calls a Windows Communication Foundation (WCF) service named MyService that
returns the quote of the day and assigns it to the QuoteOfTheDay TextBlock.
The application contains the following code segment. (Line numbers are included for reference only.)
01 Dim client = New MyService.MyServiceClient()
02 AddHandler client.GetQuoteOfTheDayCompleted, Sub(s, args) QuoteOfTheDay.Text = args.Result
03 client.GetQuoteOfTheDayAsync()
You need to handle errors that might occur as a result of the service call. You also need to provide a
default value of "Unavailable" when an error occurs.
Which code segment should you replace at lines 02 and 03?
A. QuoteOfTheDay.Text = "Unavailable"
AddHandler client.GetQuoteOfTheDayCompleted, Sub(s, args)
QuoteOfTheDay.Text = args.Result
End Sub
client.GetQuoteOfTheDayAsync()
B. AddHandler client.GetQuoteOfTheDayCompleted,Sub(s, args)
If args.Result IsNot Nothing Then
QuoteOfTheDay.Text = args.Result
Else
QuoteOfTheDay.Text = "Unavailable"
End If
End Sub
client.GetQuoteOfTheDayAsync()
C. AddHandler client.GetQuoteOfTheDayCompleted, Sub(s, args)
QuoteOfTheDay.Text = args.Result
End Sub
Try
client.GetQuoteOfTheDayAsync()
Catch ex As Exception
' TODO: handle exception
QuoteOfTheDay.Text = "Unavailable"
End Try
D. AddHandler client.GetQuoteOfTheDayCompleted, Sub(s, args)
If args.[Error] Is Nothing Then
QuoteOfTheDay.Text = args.Result
Else
' TODO: handle error
QuoteOfTheDay.Text = "Unavailable"
End If
End Sub
client.GetQuoteOfTheDayAsync()
Answer: D

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NO.4 You are developing an application by using Silverlight 4 and Microsoft .NET Framework 4.
You add a BackgroundWorker object named worker to the application.
You add the following code segment. (Line numbers are included for reference only.)
01 Public Sub New()
02 InitializeComponent()
03 worker.WorkerSupportsCancellation = True
04 AddHandler worker.DoWork, New DoWorkEventHandler(AddressOf worker_DoWork)
05 AddHandler worker.RunWorkerCompleted, New RunWorkerCompletedEventHandler(AddressOf
worker_Completed)
06 End Sub
07 Private Sub worker_DoWork(sender As Object, e As DoWorkEventArgs)
08 For i As Integer = 0 To 99
09 InvokeLongRunningProcessStep()
10 Next
11 End Sub
You need to ensure that worker can be properly canceled.
Which code segment should you use to replace line 09?
A. Dim cancel = TryCast(sender, BackgroundWorker).CancellationPending
If cancel Then
TryCast(sender, BackgroundWorker).CancelAsync()
Else
InvokeLongRunningProcessStep()
End If
B. Dim cancel = TryCast(sender, BackgroundWorker).CancellationPending
If cancel Then
e.Cancel = True
Else
InvokeLongRunningProcessStep()
End If
C. Dim cancel = e.Cancel
If cancel Then
TryCast(sender, BackgroundWorker).CancelAsync()
Else
InvokeLongRunningProcessStep()
End If
D. Dim cancel = e.Cancel
If cancel Then
e.Cancel = True
Else
InvokeLongRunningProcessStep()
End If
Answer: B

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NO.5 You are developing a Silverlight 4 application.
You define an Invoice object according to the following code segment.
Public Class Invoice
Public Property InvoiceId() As Integer
Public Property Amount() As Double
Public Property Supplier() As Supplier
Public Property InvoiceDate() As DateTime
Public Property PayDate() As DateTime
Public Property InvoiceDescription() As String
End Class
You need to display a list of invoices that have the following properties displayed on each line: InvoiceId,
Amount, and InvoiceDate.
Which XAML fragment should you use?
A. <ListBox x:Name="InvoiceListBox">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=InvoiceId}" />
<TextBlock Text="{Binding Path=Amount}" />
<TextBlock Text="{Binding Path=InvoiceDate}" />
</StackPanel>
</ListBox>
B. <ListBox x:Name="InvoiceListBox">
<StackPanel Orientation="Horizontal">
<ListBoxItem>
<TextBlock Text="{Binding Path=InvoiceId}" />
</ListBoxItem>
<ListBoxItem>
<TextBlock Text="{Binding Path=Amount}" />
</ListBoxItem>
<ListBoxItem>
<TextBlock Text="{Binding Path=InvoiceDate}" />
</ListBoxItem>
</StackPanel>
</ListBox>
C. <ListBox x:Name="InvoiceListBox">
<ListBox.Items>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=InvoiceId}" />
<TextBlock Text="{Binding Path=Amount}" />
<TextBlock Text="{Binding Path=InvoiceDate}" />
</StackPanel>
</ItemsPanelTemplate>
</ListBox.Items>
</ListBox>
D. <ListBox x:Name="InvoiceListBox">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=InvoiceId}" />
<TextBlock Text="{Binding Path=Amount}" />
<TextBlock Text="{Binding Path=InvoiceDate}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Answer: D

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NO.6 You are developing a Silverlight 4 application.
You have a collection named ColPeople of the List<Person> type.
You define the Person class according to the following code segment.
Public Class Person
Public Property Name() As String
Public Property Description() As String
Public Property Gender() As String
Public Property Age() As Integer
Public Property Weight() as Integer
End Class
You need to bind ColPeople to a ComboBox so that only the Name property is displayed.
Which XAML fragment should you use?
A. <ComboBox DataContext="{Binding ColPeople}" ItemsSource="{Binding ColPeople}"
DisplayMemberPath="Name" />
B. <ComboBox DataContext="{Binding Person}" ItemsSource="{Binding Person}"
DisplayMemberPath="ColPeople" />
C. <ComboBox DataContext="{Binding ColPeople}" DisplayMemberPath="Name" />
D. <ComboBox DataContext="{Binding Person}" />
Answer: A

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NO.7 You are developing an application by using Silverlight 4 and Microsoft .NET Framework 4. The
application has a TextBox control named txtName.
You need to handle the event when txtName has the focus and the user presses the F2 key.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose
two.)
A. AddHandler txtName.KeyDown, New KeyEventHandler ( AddressOf txtName_KeyDown)
B. AddHandler txtName.LostFocus, New RoutedEventHandler(AddressOf txtName_LostFocus)
C. AddHandler txtName.TextChanged, New TextChangedEventHandler(AddressOf
txtName_TextChanged)
D. Private Sub txtName_TextChanged(sender As Object, e As TextChangedEventArgs)
'Custom logic
If DirectCast(e.OriginalSource, Key) = Key.F2 Then
End If
End Sub
E. Private Sub txtName_KeyDown(sender As Object, e As KeyEventArgs)
'Custom logic
If e.Key = Key.F2 Then
End If
End Sub
F. Private Sub txtName_LostFocus(sender As Object, e As RoutedEventArgs)
'Custom logic
If DirectCast(e.OriginalSource, Key) = Key.F2 Then
End If
End Sub
Answer: AE

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NO.8 You are developing a Silverlight 4 application.
The application defines the following three event handlers. (Line numbers are included for reference only.)
01 Private Sub HandleCheck(sender As Object, e As RoutedEventArgs)
02 MessageBox.Show("Checked")
03 End Sub
04
05 Private Sub HandleUnchecked(sender As Object, e As RoutedEventArgs)
06 MessageBox.Show("Unchecked")
07 End Sub
08
09 Private Sub HandleThirdState(sender As Object, e As RoutedEventArgs)
10 MessageBox.Show("Indeterminate")
11 End Sub
You need to allow a check box that can be selected, cleared, or set to Indeterminate. You also need to
ensure that the event handlers are invoked when the user changes the state of the control.
Which XAML fragment should you use?
A. <CheckBox x:Name="cb2" Content="Three State CheckBox"
IsChecked="True" Checked="HandleCheck"
Indeterminate="HandleUnchecked" Unchecked="HandleUnchecked" />
B. <CheckBox x:Name="cb2" Content="Three State CheckBox"
IsThreeState="True" Checked="HandleCheck"
Indeterminate="HandleThirdState" Unchecked="HandleUnchecked" />
C. <CheckBox x:Name="cb2" Content="Three State CheckBox"
IsHitTestVisible="True" Checked="HandleCheck"
Indeterminate="HandleThirdState" Unchecked="HandleUnchecked" />
D. <CheckBox x:Name="cb2" Content="Three State CheckBox"
IsEnabled="True" Checked="HandleCheck"
Indeterminate="HandleUnchecked" Unchecked="HandleUnchecked" />
Answer: B

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