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

1. You are developing a Windows Communication Foundation (WCF) service named CalculatorService, which implements the ICalculatorService contract. The service is configured to be discoverable through UDP. CalculatorService contains multiple endpoints. One of the endpoints is configured with the following behavior.

You need to log all the endpoint metadata information that is added by the service host. Which code segment should you use?

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

2. You are creating a Windows Communication Foundation (WCF) service that accepts messages from clients when they are started. The message is
defined as follows.
<MessageContract()>
Public Class Agent
Public Property CodeName As String
Public Property SecretHandshake As String
End Class
You have the following requirements:
The CodeName property must be sent in clear text. The service must be able to verify that the property value was not changed after being sent by the client.
The SecretHandshake property must not be sent in clear text and must be readable by the service.
What should you do?

A) Add a MessageBodyMember attribute to the CodeName property and set the ProtectionLevel to Sign. Add a MessageBodyMember attribute to the SecretHandshake property and set the ProtectionLevel to EncryptAndSign.
B) Add an ImmutableObject attribute to the CodeName property and set its value property to True. Add a Browsable attribute to the SecretHandshake property and set its value to False.
C) Add a DataProtectionPermission attribute to the each property and set the ProtectData property to True.
D) Add an XmlText attribute to the CodeName property and set the DataType property to Signed. Add a PasswordPropertyText attribute to the SecretHandshake property and set its value to True.

3. You develop a Windows Communication Foundation (WCF) RESTful service that provides media streaming services.
The service includes the following code. (Line numbers are included for reference only.)

The service must return an XML response.
You need to apply the correct attribute to AddMediaTitle method.
Which code segment should you insert at line 05?

A) <WebInvoke(Method:= "POST")>
B) <WebInvoke()>
C) <WebInvoice (ResposeFormat:=WebMessageFormat .Xml, BodyStyle :=WebMessageBodyStyle.Bare) >
D) <WebInvoice(ResponseFormat :=WebMessageFormat.Xml, BodyStyle:=WebMessageBodyStyle.Wrapped)>

4. You are developing a Windows Communication Foundation (WCF) service that executes a long-running operation.
The service is accessed from your business applications in a server transaction in which the client does not participate.
You need to ensure that the transaction times out and aborts if the operation has not completed within 45 seconds.
What should you do?

A) Set the service binding sendTimeout attribute to 00:00:45.
B) Set the service binding receiveTimeout attribute to 00:00:45.
C) Apply <OperationBehavior (TransactionScopeRequired:=False) > to the service operation.
D) Apply OerviceBehavior (TransactlonTiitieout: = "00:00:45")> to the service
implementation.

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

Solutions: