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

1. A Windows Communication Foundation (WCF) client uses the following service contract. (Line numbers are included for reference only.)
01 [ServiceContract] 02 public interface IService 03 ( 04 [OperationContractj 05 string Operation1O; 06 [OperationContract] 07 string Operation2(), 08)
You need to ensure that all calls to Operation 1 and Operation2 from the client are encrypted and signed.
What should you do?

A) Set the ProtectionLevel property in line 01 to EncryptAndSign.
B) Set the ProtectionLevel property in line 04 and line 06 to Sign.
C) Add a SecurityCriticalAttribute ror each operation.
D) Add a SecunitySafeCriticalAttribute for each operation.

2. You are creating a client application and configuring it to call a Windows Communication
Foundation (WCF) service. When the application is deployed, it will be configured to send
all messages to a WCF routing service.
You need to ensure that the application can consume the target service after the application is deployed.
What should you do?

A) In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the router service.
B) In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the router service.
C) In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the target service.
D) In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the target service.

3. You are developing a client application that consumes a Windows Communication Foundation (WCF) service.
You use the svcutil.exe utility to create a proxy for the service.
You use the svcutil.exe switches that generate asynchronous calls. GetFlight is a service operation that takes no parameters and returns a string. The GetFlightCallback method must be called when the service operation returns.
You create an instance of the client proxy with the following code.
var client = new TravelServiceClient();
You need to ensure that a callback is received when the GetFlight operation is called asynchronously.
Which code segment should you use?

A) IAsyncResult asyncResult = client.BeginGetFlight( GetFlightCallback, client); client.EndGetFlight(asyncResult);
B) client.GetFlight(); client.BeginGetFlight(GetFlightCallback, null);
C) client.BeginGetFlight(GetFlightCallback, null); client.GetFlight();
D) client.GetFlightCompleted += new EventHandler<GetFlightCompletedEventArgs>( GetFlightCallback); client.GetFlightAsync();

4. You are creating a Windows Communication Foundation (WCF) service that accepts claims-based tokens.
You need to ensure that the service can use claims from trading partners even though there are variations on naming for the same elements.
Which two actions should you perform? (Each correct answer presents part of the solution Choose two.)

A) Within the operation, verify the presence of the required claims in the current Authorization Context
B) Apply a Principal Permission attribute on the operation with the required claims listed in the Roles property.
C) Register a custom Service Authorization Manager that implements Check Access In this method, use System. Convert. Change Type to transform the incoming claim set to a Windows Claim Set type.
D) Register an Authorization Policy that maps external claims to an internal Claim Set.

5. 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.
[OperotionConcroct(AsyncPactern = false)
Insert the following code at line 07.
[OperacionConcracc(AsyncPactern = true)]
C) Insert the following code at line 04.
[OperationContract]
Insert the following code at line 07.
[OperationConcracc(AsyncPactern = true)]
D) Insert the following code at line 04.
[OperationConcracc(AayncPaccern = true)]

Solutions: