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

1. You are creating a Windows Communication Foundation (WCF) service that uses claims-based authorization. The following code retrieves the correct claim set.
var claims = ServiceSecurityContext.Current.
AuthorizationContext.ClaimSets[0];
You need to validate that the requesting client application has included a valid DNS value in the claim.
Which code segment should you use to retrieve the claim for validation?

A) claims.FindClaims(ClaimTypes.Dns, Rights.Identity) .FirstOrDefault();
B) claims.ContainsClairo(Claim.CreateDnsClaim(ClaimTypes.Dns));
C) claims.FindClaims(ClaimTypes.Dns, Rights.PossessProperty) .FirstOrDefault();
D) claims.Equals(ClaimTypes.Dns);

2. You are modifying a Windows Communication Foundation (WCF) service that allows customers to update financial data. The service currently requires a transaction from the client application and is working correctly. The service contract is defined as follows. (Line numbers are included for reference only.)

The service must be modified so that client applications do not need to initiate a transaction when calling the operation. The service must use the client application's transaction if one is available. Otherwise it must use its own transaction.
You need to ensure that the service operation is always executed within a transaction.
What should you do?

A) Replace line 05 with the following code. <TransactionFlow( TransactionFlowOption.Allowed) >
B) Replace line 13 with the following code. <OperationBehavior( TransactionScopeRequired:"False, TransactionAutoComplete:-True)>
C) Replace line 05 with the following code. <TransactionFlow( TransactionFlowOption.NotAliowed)>
D) Replace line 13 with the following code. <OperatlonBehavior( TransaetionScopeRequired:"False, TransactionAutoComplete:"False)>

3. You are developing a client application that uses the following code to consume a Windows
Communication Foundation (WCF) service. (Line numbers are included for reference only.)
01 Dim myBinding As BasicHttpBinding =
New BasicHttpBinding()
02 Dim myEndpointAddress As EndpointAddress =
New EndpointAddress(
"http://contoso.com/TaxService.svc")
04 Dim client As ITaxService =
channelFactory.CreateChannel()
05 Dim data As String = client.GetData(1)
You need to consume the service.
Which code segment should you insert at line 03?

A) Dim channelFactory =
New ChannelFactory(Of ITaxService)()
B) Dim channelFactory =
New ChannelFactory(Of ITaxService)(myBinding)
C) Dim channelFactory =
New ChannelFactory(Of ITaxService)
(myBinding, myEndpointAddress)
D) channelFactory =
New ChannelFactory(Of ITaxService)
("http://contoso.com/TaxService.svc")

4. You develop a Windows Communication Foundation (WCF) service to generate reports. Client applications call the service to initiate report generation but do not wait for the reports to be generated. The service does not provide any status to the client applications.
The service class is defined as follows. (Line numbers are included for reference only.)

You need to ensure that client applications can initiate reports without waiting for status.
Which two actions should you perform (Each correct answer presents part of the solution. Choose two.)

A) Remove line 08. At line 05, change the return type of GenerateReports method to void.
B) Insert the following code at line 04. [OperationContract(AsyncPattern=false)]
C) At line 05, change the GenerateReports method from private to public.
D) Insert the following code at line 04. [OperationContract(IsOneWay=true)]

5. A Windows Communication Foundation (WCF) service uses the following service contract.
[ServiceContract]
public interface IService
{
[OperationContract]
string Operation 1 (string s);
}
You need to ensure that the operation contract Operationi responds to HTTP POST requests.
Which code segment should you use?

A) [OperationContract(ReplyAction z 'POST')J string Operationi (string s);
B) [OperationContract(Action WPOST)1 string Operationl(string s);
C) [OperationContract| [WebGet(UriTemplate = POST')] string Operation 1 (string s);
D) [OperationContract| [Weblnvoke(Method POST)] string Operationl(string s);

Solutions: