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

1. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application displays a list of books.
You write the following code fragment. (Line numbers are included for reference only.)

You need to ensure that book titles that are out of stock appear in red.
Which code fragment should you insert at line 12?

A) <Style.Triggers>
<Trigger Binding. XmlNamespaceManager="{Binding XPath=Book@Stock> " Value="out">
<Setter Property="Foreground" Value="Red" />
</Trigger> </Style.Triggers>
B) <Style.Triggers>
<Trigger Binding. XmlNamespaceManager="
< Binding XPath=GStock>" Value="out">
<Setter Property="Foreground" Value="Red" />
</Trigger>
</Style.Tr iggers>
C) <Style.Triggers>
<DataTrigger Binding-"Binding XPath=Book@Stock}" Value="out">
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
</Style.Triggers>
D) <Style.Triggers>
<DataTrigger Binding="{Binding XPath=@Stock}" Value="out">
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
</Style.Triggers>

2. You are developing a Windows Presentation Foundation (WPF) application.
The application has an Image control.
You need to ensure that a portion of the image displays in a circle in the control.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A) Add an Ellipse element to the control. Use Ellipse.Fill and ImageBrush with the image as ImageSource.
B) Add an Image.Clip element to the control. Use LineGeometry within Image.Clip.
C) Add an Ellipse element to the control. Use Ellipse.Stroke and ImageBrush with the image as ImageSource.
D) Add an Image.Clip element to the control. Use EllipseGeometry within Image.Clip.

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

4. You are developing a Microsoft .NET 4 application.
You need to ensure that security error trapping handles transparency violations.
What should you do?

A) Handle only SecurityAction.Demand transparency violations.
B) Handle only SecurityAction.Assert transparency violations.
C) Handle all thrown transparency violations explicitly.
D) Handle only SecurityAction.PermitOnly transparency violations.

5. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList.
You need to ensure that changes to ProductList are automatically reflected in the ListBox control.
What should you do?

A) Extend the DependencyObject class in the Product class.
B) Implement the INotifyPropertyChanged interface in the Product class.
C) Extend the ObservableCollection<Product> class in the ProductList class.
D) Implement the IQueryable<Product> interface in the ProductList class.

Solutions: