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

1. You are developing a Windows Presentation Foundation (WPF) application.
The movement of a control within the application is animated.
You need to ensure that the animated control is continually animated in one direction.
What should you specify for the easing function of the animations?

A) BounceEase
B) SineEase
C) BackEase
D) ElasticEase

2. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code segment. (Line numbers are included for reference only.)

You add the following code fragment within a WPF window control.

You need to ensure that the Contact class contains a business rule to ensure that the ContactName property is not empty or NULL. You also need to ensure that the TextBox control validates the input data.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two).

A) Replace line 01 with the following code segment. Public Class Contact Inherits ValidationRule
B) Add the following code segment at line 03. Public Event PropertyChanging As PropertyChangingEventHandler Modify line 08 with the following code segment: Set If Me.PcopertyChanging <> Nothing Then Proper:tyChanging(Me, New PropertyChangingEventArgs("ContactName")) End If If String. IsNull OrEmpty(value) Then Throw New ApplicationExceptionf'Contact name is required") End If contactNaroe = value End Set
C) Add the following code segment at line 12. Public Readonly Property [Error] () As String Get Throw New Exception( string.Empty ) End Get End Property Public Default Readonly Property Item(columnName As String) As String Get If columnName = "ContactName" AndAlso String.IsNullOrEmpty(Me.ContactName) Then Return "Contact name is re quired" End If Return Nothing End Get End Property
D) Replace line 01 with the following code segment. Public Class Contact Implements INotifyPropertyChanging
E) Replace line 01 with the following code segment. Public Class Contact Implements IDataErrorInfo

3. You develop a Windows Presentation Foundation (WPF) application. This application is used to output data trends to customer service representatives.
You use threading to keep the UI responsive. You have a function named UpdateUI that updates all of the UI components.
You use the following code to update the _Data variable. (Line numbers included for reference only.)

You need to update the user interface without knowing if you are on the UI thread.
Which code segment should you insert at line 06?

A) If (Me. Dispatcher. CheckAccess())
Then UpdateUI()
Else
Dim (function] = New Action(AddressCf OpdateUI)
Dim args() As Object = Nothing
Me .Dispatcher ,BeginInvoIce ( [function; , args)
End If
B) Me. Dispatcher.VerifyAccess ()
UpdateUI()
C) If (Me.Dispatcher.CheckAcce33()) Then
Dim [function] = New Action(Addre33Cf UpdateUI)
Dim args() As Object = Nothing
Me.Dispatcher.Beginlnvoke([function], args)
Else
UpdateUI()
End If
D) Me.Dispatcher.VerifyAccess()
Dim [function] = New Action(AddressCf UpdateUI)
Dim args() As Object = Nothing
Me .Dispatcher .BeginlnvoJce ([function], args)

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

5. You are developing a Windows Presentation Foundation (WPF) application. The application uses a DockPanel control with its HorizontalAlignment property set to Left to divide the main window into three distinct columns. Each column is a panel that is responsible for the layout of its own controls.
You need to reverse the order of the columns.
What should you do?

A) set the DockPanel.Dock property to Right on each of the panels.
B) set the LayoutTransform property to Identity on the DockPanel.
C) Set the FlowDirection property to RightToLeft on each of the panels.
D) Set the HorizontalAlignment property to Right on the DockPanel.

Solutions: