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Microsoft TS: Windows Applications Development with Microsoft .NET Framework 4 Sample Questions:

1. You use Microsoft .NET Framework 4 to create a Windows Forms application.
You write the following code segment. (Line numbers are included for reference only.)
01 NotInheritable Class FormSettings
02 Inherits ApplicationSettingsBase 03
04 Public Property Description() As [String]
05 Get
06 Return DirectCast(He("Description"), [String])
07 End Get
08 Set
09 Me("Description") -value
10 End Set
11 End Property
12 End Class
You need to ensure that the first time each user opens the application, a text field displays the following message: "Please enter your setting."
Which code segment should you insert at line 03?

A) <UserScopedSetting()>
<SettingsDescription("Description: Please enter your setting.")>
B) <UserScopedSetting() >
<DefaultSettingValue("Please enter your setting.")>
C) <ApplicationScopedSetting()>
<DefaultSettingValue("Please enter your setting.")>
D) <ApplicationScopedSetting()>
<SettingsDescription("Description: Please enter your setting.")>

2. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
You add a TreeView control to show the hierarchical structure of orders and order details. Each order contains an ObservableCollection named OrderDetails.
You write the following code fragment. (Line numbers are included for reference only.)

---
You need to ensure that the TreeView control meets the following requirements:
Each order is shown as a TreeView node.
The order nodes have order detail nodes as children.
The order detail nodes have no children.
Which code fragment should you insert at line 07?

A) <HierarchicalDataTemplate x:Key="OrderTemplate" ItemsSource="{Binding Path=OrderDetails}" ItemTemplate="{StaticResource OrderDetailTemplate}"> <TextBlock Text="{Binding Path=.}" /></HierarchicalDataTemplate>
B) <HierarchicalDataTemplate x : Key== "Order Temp late" ItertisSource="{ Binding Path=orders>" ItemTemplate="{StaticResource OrderDetailTemplate}"> <TextBlock Text="{Binding Path=.}" /> </HierarchicalDataTemplate>
C) <HierarchicalDataTemplate x:Key="OrderTemplate" ItemsSource="{Binding Path=orders}" DataType="Order"> <TextBlock Text="{Binding Path=.}" /> </HierarchicalDataTemplate>
D) <HierarchicalDataTemplate x:Key="OrderTemplate" DataType="Order"
ItemTeinplate="{StaticResource OrderDetailTemplate} ">
<TextBlock Text="{Binding Path=.}" />
</HierarchicalDataTemplate>

3. You are developing a Windows Presentation Foundation (WPF) application with the following class. (Line numbers are included for reference only

The UI is not being updated when the Data property is set.
You need to ensure that the DisplayData class correctly updates the UI when the Data property is set.
What should you do?

A) Insert the following code at line 14. NotifyPropertyChanged("Data");
B) Insert the following code at line 16. NotifyPropertyChanged("Data");
C) Insert the following code at line 14. NotifyPropertyChanged(value);
D) Insert the following line at line 16. NotifyPropertyChanged(value);

4. You use Microsoft .NET Framework 4 to create a Windows Forms application.
You add a new class named Customer to the application. You select the Customer class to create a new object data source.
You add the following components to a Windows Form:
- A BindingSource component named customerBindingSource that is data-bound to the Customer object data source.
- A set of TextBox controls to display and edit the Customer object properties. Each TextBox control is data-bound to a property of the customerBindingSource component.
- An ErrorProvider component named errorProvider that validates the input values for each TextBox control.
You need to ensure that the input data for each TextBox control is automatically validated by using the ErrorProvider component.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Implement the validation rules inside the TextChanged event handler of each TextBox
control by throwing an exception when the value is invalid.
B) Implement the validation rules inside the setter of each property of the Customer class
by throwing an exception when the value is invalid.
C) Add the following code segment to the InitializeComponent method of the Windows
Form.
this.errorProvider.DataSource = this.customerBindingSource.DataSource;
this.errorProvider.DataMember = this.customerBindingSource.DataMember;
D) Add the following code segment to the InitializeComponent method of the Windows
Form.
this.errorProvider.DataSource = this.customerBindingSource;
E) Implement the validation rules inside the Validating event handler of each TextBox
control by throwing an exception when the value is invalid.

5. You are developing a Windows Presentation Foundation (WPF) application.
Users can enter formatted percentages into text boxes. The markup is as follows.
<TextBox Text="{Binding Path=Percentage,
Converter={StaticResource PercentValueConverter}}" />
Percentage is a decimal property.
You need to store the percentages as their decimal values, not their display values.
Which code segment should you use?

A) public object ConvertBack(object value, Type targetType,
object parameter, CultureInfo culture)
{
return (decimal.Parse(parameter.ToString()) / 100);
}
B) public object Convert (object value, Type targetType,
object parameter, CultureInfo culture)
{
return ((decimal)value).ToString("P");
}
C) public object Convert(object value. Type targetType,
object parameter, CultureInfo culture)
{
return ((decimal)parameter).ToString(nPn);
}
D) public object ConvertBack(object value, Type targetType,
object parameter, CultureInfo culture)
{
return (decimal.Parse(value.ToString()) / 100);
}

Solutions: