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Microsoft TS: Windows Communication Foundation velopment with Microsoft .NET Framework 4 Sample Questions:

1. A Windows Communication Foundation (WCF) service has a callback contract. You are developing a client application that will call this service.
You must ensure that the client application can interact with the WCF service.
What should you do?

A) On the client, create a proxy derived from DuplexClientBase(Of TChannel).
B) On the client, use GetCallbackChannel (Of T).
C) On the OperationContractAttribute, set the ReplyAction property value to the endpoint address of the client.
D) On the OperationContractAttribute, set the AsyncPattern property value to True.

2. You are developing a Windows Communication Foundation (WCF) service. The service configuration file has a <System.Diagnostics> 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 <System.Diagnostics> element?

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

3. You are hosting a Windows Communication Foundation (WCF) service under Microsoft Internet Information Services (IIS) 7.0.
You have set up a Web site in IIS Manager. The physical path is C:\wwwroot\Calendar. There is a Calendar.svc file in the C:\wwwroot\Calendar folder. It contains the following directive.
<%@ ServiceHost Language="C#" Debug="true" Service="Calendar.Calendar" CodeBehind="Calendar.svc.cs" %>
The Calendar.svc.cs file contains the source for the Calendar class in the Calendar namespace. You compile this code into the Calendar.dll file.
You need to deploy your service to the Web site.
What should you do?

A) Copy the Calendar.dll file to the C:\wwwroot\Calendar\code folder.
B) Copy the Calendar.svc.cs file to the C:\wwwroot\Calendar\bin folder.
C) Copy the Calendar.dll file to the C:\wwwroot\Calendar\bin folder.
D) Copy the Calendar.svc.cs file to the C:\wwwroot\Calendar\code folder.

4. You are creating a Window s Communication Foundation (WCF) service application. The
application needs to service many clients and requests simultaneously. The application also needs to ensure subsequent individual client requests provide a stateful conversation.
You need to configure the service to support these requirements.
Which attribute should you add to the class that is implementing the service?

A) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerSession, ConcurrencyMode:=ConcurrencyMode.Multiple)>
B) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerCall, ConcurrencyMode:=ConcurrencyMode.Reentrant)>
C) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerSession, ConcurrencyMode:=ConcurrencyMode.Single)>
D) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerCall, ConcurrencyMode:=ConcurrencyMode.Multiple)>

5. You are developing a Windows Communication Foundation (WCF) service that does not operate on a duplex channel.
You find that operations do not start until all previous operations have finished. The service hosting code contains the following lines.
Dim service = New WarehouseService()
Dim hose = New ServiceHost(service)
You need to ensure that new operations do not wait for previous operations to finish.
Which attribute should you use to decorate the service?

A) <ServiceBehavior( InstanceContextMode:=InstanceContextMode.Single, ConcurrencyMode:=ConcurrencyMode.Single) >
B) <ServiceBehovior( InstanceContextMode:=InstanceContextMode.Single, ConcurrencyMode:=ConcurrencyMode.Multiple)>
C) <ServiceBehavior( InstanceContextMode:=InstanceContextMode.Single, ConcurrencyMode:=ConcurrencyMode.Reentrant)>
D) <CallbackBehavior( ConcurrencyMode:=ConcurrencyMode.Multiple)>

Solutions: