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

1. You are modifying a Windows Communication Foundation (WCF) service that provides access to report generation system. The following code segment is part of your service contract. (Line numbers are included for reference only.)

Client applications are blocked while the service processes reports. You need to ensure that the service methods are asynchronous. What should you do?

A) Insert the following code at line 04. [OperationContract (AsyncPattern = false)]
B) Insert the following code at line 04. [OperationContract] Insert the following code at line 07. [OperationConcracc(AsyncPactern = true)]
C) Insert the following code at line 04. [OperationConcracc(AayncPaccern = true)]
D) Insert the following code at line 04. [OperotionConcroct(AsyncPactern = false) Insert the following code at line 07. [OperacionConcracc(AsyncPactern = true)]

2. You are creating a Windows Communication Foundation (WCF) service. The service endpoints change frequently.
On the service, you add a new ServiceDiscoveryBehavior to the Behaviors collection of the ServiceHost Description property.
You need to ensure that client applications can communicate with the service and discover changes to the service endpoints.
What should you do?

A) Add a new ServiceDiscoveryBehavior to the Behaviors collection in the client application.
B) Use the FindCriteria class and the UdpDiscoveryEndpoint class to set up the binding in the client application.
C) Use the DiscoveryProxy class and the EndpointDiscoveryMetadata class to set up the binding in the client application.
D) Add a new AnnouncementClient to the Behaviors collection in the client application.

3. A Windows Communication Foundation (WCF) service is self-hosted in a console application. The service implements the ITimeService service interface in the TimeService class.
You need to configure the service endpoint for HTTP communication.
How should you define the service and endpoint tags?

A) Define the service tag as follows.
<service name=" TimeService ">
Define the endpoint tag as follows.
<endpoint address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService "/ >
B) Define the service tag as follows.
<service name=" ITimeService ">
Define the endpoint tag as follows.
< endpoint name=" TimeService "
address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService "/ >
C) Define the service tag as follows.
<service name=" ITimeService " >
Define the endpoint tag as follows.
< endpoint kind =" TimeService "
address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService"/ >
D) Define the service tag as follows.
<service name=" TimeService ">
Define the endpoint tag as follows.
< endpoint kind=" TimeService "
address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService " / >

4. A Windows Communication Foundation (WCF) client application is consuming an RSS syndication feed from a blog. You have a SyndicationFeed variable named feed. The application iterates through the items as follows. (Line numbers are included for reference only.)
01 foreach (SyndicationItem item in feed.Items)
02 {
03 }
You need to display the content type and body of every syndication item to the console.
Which two lines of code should you insert between lines 02 and 03?

A) Console.WriteLine(item.Content.GetType()); Console.WriteLine(((TextSyndicationContent)item.Content).Text);
B) Console.WriteLine(item.Content.GetType()); Console.WriteLine(item.Content.ToString());
C) Console.WriteLine(item.Content.Type); Console.WriteLine(((TextSyndicationContent)item.Content).Text);
D) Console.WriteLine(item.Content.Type); Console.WriteLine(item.Content.ToString());

5. You develop a Windows Communication Foundation (WCF) service. You enable all
performance counters and run multiple calls to the service.
The service must isolate session data for each user.
You need to monitor the instancing behavior used in the service.
Which performance counter should you monitor?

A) ServiceModelService 4.0.0.0\Calls
B) ASP.NET State Service\State Server Sessions Total
C) ASP.NET State Service\State Server Sessions Active
D) ServiceModelService 4.0.0.0\Instances

Solutions: