You are developing a Windows Presentation Foundation (WPF) application. You need to use XAML to create a custom control that contains two Button controls. From which base class should you inherit? （）A、 FrameworkElementB、 UIElementC、 UserControlD、 Button

You are developing an application that performs file backups in the background. The background application will host a Windows Communication Foundation (WCF) service and must be active as soon as the machine is running. The background application will not have a user interface. A front-end application will consume the WCF service and will provide the user interface.You need to choose a host environment for the WCF service.Which hosting environment should you choose? （）

A. Microsoft Internet Information Services (IIS) 6.0

B. Windows Process Activation Services (WAS)

C. A Windows Forms application

D. A Windows Service

You are developing a Windows Communication Foundation (WCF) service.You must record all available information for the first 1,000 messages processed, even if they are malformed.You need to configure the message logging section of the configuration file.Which configuration segment should you use? （）

A.

B.

C.

D.

You are developing a Windows Communication Foundation (WCF) service. You enable logging in the configuration file.The opening tag is defined as follows.<messagelogging br="" logentiremessage="true"> logMalformedMessages="true"logMessagesAtServiceLevel="true"logMessagesAtTransportLevel="true"maxMessagesToLog="20">You need to ensure that logging is implemented so that only messages with SOAP headers are logged.What should you add to the filters element of the application configuration file?（）

A.

B.

C.

D.

You are developing a Windows Presentation Foundation (WPF) application to play audio files. You add MediaElement mediaElement1 and a Button control named btnPlayAudio to the design surface. The MediaElement co.. audio file. The LoadedBehavior attribute is set to Manual.You add the following code to the main Window.You set the command of the button to MediaCommands.Play.You need to ensure that the application will play the audio file when the button is pressed.What should you add to constructor of the main window ?（）

A.

B.

C.

D.

You are developing a Windows Communication Foundation (WCF) service that is hosted by a Windows Forms Application.The ServiceHost instance is created in the Form Constructor.You need to ensure that the service is not blocked while the UI thread is busy.What should you do?（）

A. Decorate the service implementation class with the following line of code [ServiceBehavior(UseSyncronizationContext = false)]

B. Decorate the service implementation class with the following line of code [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]

C. Call the Invoke method of the form and supply a delegate.

D. Call the BeginInvoke method of the form and supply a delegate.

You are developing a Windows Communication Foundation (WCF) service. The service configuration file has a element defined. You need to ensure that all security audit information, trace logging, and message logging failures are recorded.Which configuration segment should you add to the element?（）

A.

B.

C.

D.

You are developing a Windows Communication Foundation (WCF) service. The service operation takes a customer number as the only argument and returns information about the customer. The service requires a security token in the header of the message. You need to create a message contract for the service.Which code segment should you use?（）

A.

B.

C.

D.

You are developing a Windows Service. The Windows Service will host a Windows Communication Foundation (WCF) service.The Windows Service class will inherit from ServiceBase.You need to ensure that the WCF service starts when the Windows Service is restarted.What should you do in the Windows Service class?（）

A.

B.

C.

D.

A. Add single DatePicker control to the design surface

B. Add single Calendar control to the design surface

C. Add single MediaElement control to the design surface to display a calendar

D. Add the appropriate Windows Forms references to the project references. Add a single Windows Forms DateTimePicker control to the design surface