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

1. You are developing a Windows Presentation Foundation (WPF) application.
The application uses drag-and-drop functionality.
You need to ensure that code is executed in the code-behind file when the dragged item is released onto the target element.
Which enumeration should you use?

A) DragDropEffects.All
B) DragAction.Cancel
C) DragDropEffects.None
D) DragAction.Drop

2. You are developing a Windows Presentation Foundation (WPF) application.
You plan to deploy the WPF application by using ClickOnce. The application will be
associated to files that have an extension of .abc.
You need to ensure that when a user opens the application by double-clicking an .abc file,
a TextBlock named txtBlock1 displays the path of the file. Which code should you use?

A) Option A
B) Option C
C) Option B
D) Option D

3. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
You write the following code fragment.
< StackPanel TextBox.PreviewTextInput="StackPanel_PreviewTextInput" >
< TextBox Name="TxtBoxA"/>
< TextBox Naroe="TxtBoxB"/>
< TextBox Name="TxtBoxC"/>
< /StackPanel>
You create an event handler named StackPanel_PreviewTextInput. You also have a collection of strings named Keywords.
You need to ensure that TxtBoxA and TxtBoxB do not contain any of the strings in the Keywords collections.
Which code segment should you use?

A) private void StackPanel_PreviewTextInput(
object sender, TextCompositionEventArgs e) (
FrameuorkEleroent feSource sender as Framework Element:
if (resource.Name == "TxtBoxA" || feSource.Name == "TxtBoxB")
{
foreach(string keyword in Keywords)
if(e.Text.Contains(keyword) )
{
B) private void StackPanel PreviewTextlnput(
object sender, TextCompositionEventArgs e)
{
FrameworkElement feSource = sender as FrameworkElement;
if (feSource.Name == "TxtBoxA" || feSource.Name == "TxtBoxB")
{
foreach(string keyword in Keywords)
{
if(e.Text.Contains(keyword) )
{
C) Handled = true;
}
}
D) Handled = false; } }
E) private void StackPanel_PreviewTextInput(
object sender, TextCompositionEventArgs e)
{
FrameworkElement feSource = e. Source as FrameworkElement;
if (feSource.Name == "TxtBoxA" || feSource.Name == "TxtBoxB")
{
foreach(string keyword in Keywords) {
if(e.Text.Contains(keyword) )
{
F) Handled = false; return;
}
}
G) Handled = true; return;
}
}
H) Handled = true;
} }
I) Handledfalse;
return;
}
}
J) Handled = false;
}
}
K) Handled = true; return; )
}
L) private void StackPanel_PreviewTextInput(
object sender, TextCompositionEventArgs e)
(
FrameworkElement feSource = e.Source as FrameworkElement; if
(feSource.Name == "TxtBoxA" || feSource.Name == "TxtBoxB")
{
foreach(string keyword in Keywords)
{
if(e.Text.Contains(keyword))
{

4. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application uses the background worker process (BWP).
When the user clicks a button, the background worker executes a method named DoCalculations asynchronously.
You need to implement a progress bar on the user interface (UI) that Informs the user of the progress of DoCalculations.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Call the ReportProgress method of the background worker in DoCalculations.
B) Modify the Value property of the progress bar in DoCalculations.
C) Modify the Value property of the progress bar in the ProgressChanged event handler of the background worker.
D) Modify the Value property of the progress bar in the RunWorkerCompleted event handler of the background worker.
E) Call the ReportProgress method of the background worker in the DoWork event handler of the background worker.

5. You use Microsoft .NET Framework 4 to create an application. The application contains a partially trusted client assembly and a server assembly.
You create a custom sandboxed application domain.
You need to ensure that the application can be executed in a partial-trust environment.
What should you do?

A) Apply the following attribute to the client assembly.
<Assembly: AllowPartiallyTrustedCallers(PartialTruscVisibilityLevel=NotVisibleByDefault)>
B) Apply the following attribute to the server assembly.
<Assembly: AllowPartiallyTrustedCallers(PartialTrustVislbilityLevel-NotVisibleByDefault)>
C) Apply the following attribute to the client assembly.
<Assembly: AllowPartiallyTrustedCallers(PartialTrustVisibilityLevel=VisibleToAllHosts)>
D) Apply the following attribute to the server assembly.
<Assembly: AllowPartiallyTrustedCallers(ParcialTcustVisibilityLevel-VisibleToAllHosts)>

Solutions: