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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. You do not want to expose the internal implementation at the service layer. You need to expose the following class as a service named Arithmetic with an operation named Sum.
public class Calculator
{ public int Add(int x, int y)
{
}
}
Which code segment should you use?

A) [ServiceContract(ConfigurationName="Arithmetic")] public class Calculator
{
[OperationContract(Action="Sum")]
public int Add(int x, int y)
{
.....
}
}
B) [ServiceContract(Name="Arithmetic")] public class Calculator
{
[OperationContract(ReplyAction="Sum")]
public int Add(int x, int y)
{
.....
}
}
C) [ServiceContract(Name="Arithmetic")]
public class Calculator
{ [OperationContract(Name="Sum")]
public int Add(int x, int y)
{
....
}
}
D) [ServiceContract(Namespace="Arithmetic")]
public class Calculator
{
[OperationContract(Action="Sum")]
public int Add(int x, int y)
{
.....
}
}

2. You are developing a Windows Communication Foundation (WCF) service that reads messages from a public non-transactional MSMQ queue.
You need to configure the service to read messages from the failed-delivery queue.
Which URI should you specify in the endpoint configuration settings of the service?

A) net.msmq://localhost/system$;DeadLetter
B) net.msmq://localhost/system$;DeadXact
C) net.msmq://localhost/msmq$;DeadLetter
D) net.msmq://localhost/msmq$;FailedMessages

3. The endpoint of a Windows Communication Foundation (WCF) service uses basicHttpBinding for its binding Your Company's policies have changed to require that messages not be sent in clear text.
You must ensure that all messages are encrypted when traveling across the network What should you do?

A) Set the ProtectionLevelAttribute on the service contract and update the binding attribute in the endpoint element of the configuration file to wsHttpBinding
B) Set the ProtectionLevelAttribute on the service contract and update the bindingConfiguration attribute in the endpoint element of the configuration file to webHttpBinding
C) Set the PrincipalPermissionAttribute on the service contract and update the binding attribute in the endpoint element of the configuration file to wsHttpBinding
D) Set the PrincipalPermissionAttribute on the service contract and update the bindingConfiguration attribute in the endpoint element of the configuration file to wsHttpBinding.

4. You are developing a Windows Communication Foundation (WCF) service.
You need to enable security auditing for all events.
What should you do?

A) Set the serviceAuthorizationAuditLevel setting to Success and the messageAuthenticationAuditLevel setting to Success.
B) Set the serviceAuthorizationAuditLevel setting to SuccessAndFailure and the messageAuthenticationAuditLevel setting to SuccessAndFailure.
C) Set the messageAuthenticationAuditLevel setting to Success and the auditLogLocation setting to Application.
D) Set the messageAuthenticationAuditLevel setting to SuccessAndFailure and the auditLogLocation setting to Security.

5. You are developing a Windows Communication Foundation (WCF) client application.
You instantiate a client class that inherits from ClientBase. The client instance must always be shut down in such a way that tt can free up any resources it is referencing. You need to ensure that all exceptions are caught and the instance is always properly shut
down.
Which code segment should you use?

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

Solutions: