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

1. You are migrating a Windows Forms application to a Windows Presentation Foundation (WPF) application.
You need to create a window to display controls. The controls must be positioned by using fixed coordinates.
Which control should you use in the WPF application?

A) WrapPanel
B) StackPanel
C) Grid
D) UniformGrid
E) Canvas

2. You are developing a Windows Presentation Foundation (WPF) application for managing student information. You place a Button control named btnSort and a DataGrid control named dgStudents on the design surface of the MainWindow.xaml file. You create a Student class with two properties: FirstName and LastName. You create the following code segment in the constructor of the main window.

The DataGrid control displays the list of students unsorted.
You need to ensure that the list of students is sorted by last name.
Which code segment should you add to the click event handler of the Button control?

A) Students.Reverse ( ); dgStudents.ItemsSource = Students;
B) Students.Sort (); dgStudents.ItemsSource = Students;
C) IEnumerable<student> sortedStudents = Students.OrderBy(s => s.LastName); dgStudents.ItemsSource = sortedStudents;
D) IEnumerable<Student> sortedStudents = Students.OrderBy(s => s.LastName).ToList(); dgStudents.ItemsSource = sortedStudents;

3. You have a method named Method1. Method1 accepts a string parameter named param1. Method1 performs a complex operation on param1.
You load an array of strings to a variable named array 1. The array contains 1,000 items.
You need to ensure that other methods that call Method1 can use multiple processor cores when they execute.
Which code segment should you use?

A) Array1.AsParalle1().ForAll(Me.Method1)
B) For Each item. As String In array1 Me.Method1(item) Next
C) Array1.AsQueryable().AsParallel()
D) Array1.AsQueryable.All (Me.Method1)

4. You are developing a Windows Presentation Foundation (WPF) application.
There is an issue in the display of Label. When you open the WPF Visualizer, you see the following information in the left-hand panel of the Visualizer.

You need to identify the XAML markup for the Label control that caused the issue.
Which markup segment corresponds to the Label control?

A) <Label Name="Label1">
Button Click="Button Clicks
<StackPanel Orientation="Horizontal">
<TextBlock Text="Click!" />
<Button Content="Click!" Click="Button_Click" />
</StackPanel>
</Button></Label>
B) <Label Name="Label1">
<StackPanel Orientation="Horizontal">
<TextBlock Text="Click!" />
<Button Content="Click!" Click="Button_Click" />
</StackPanel>
</Label>
C) <Label Name-"Labe;1">
<StackPanel Orientation="Horizontal">
<Button Click="Button_Click">
<TextBlock Text="Click!" />
</Button>
</StackPanel>
</Label>
D) <Label Name="Label1">
<Button Click="Button_Click">
<StackPanel Orientation="Horizontal">
<TextB1ock Text="Click!" />
</StackPanel>
</Button>
</Label>

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

Solutions: