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Microsoft TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation Sample Questions:

1. You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. The service will authenticate the client applications by using Personal Information Cards.
You write the following code segment. (Line numbers are included for reference only.)

You need to ensure that only those client applications that provide a valid e-mail address can execute the Update method.
Which code segment should you insert at line 08?

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

2. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service has an operation contract named GetMessage.
You write the following code segment to implement the service. (Line numbers are included for reference only.)

You need to send the contents of the File.xml file to a client application by using the SOAP body.
Which code segment should you insert at line 08?

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

3. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service uses the net.tcp transport. You need to ensure that when the server starts, the service starts and continues to run. What should you do?

A) Host the service under IIS 7.0 by using IIS 6.0 compatibility mode.
B) Host the service in a Windows service.
C) Host the service in a Windows Presentation Foundation application.
D) Host the service under IIS 7.0 by using Windows Activation Services.

4. You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You create the following service contract.
[ServiceContract]
public interface IMath
{
[OperationContract]
int Add(int num1, int num2);
}
You need to add an operation contract to perform the Add operation asynchronously. Which operation contract should you use?

A) [OperationContract]IAsyncResult BeginAdd(int num1, int num2);[OperationContract]int EndAdd (IAsyncResult res);
B) [OperationContract(AsyncPattern=true)]IAsyncResult BeginAdd(int num1, int num2,
AsyncCallback cb,
object state);int EndAdd(IAsyncResult res);
C) [OperationContract(AsyncPattern=true)]IAsyncResult BeginAdd(int num1, int num2);int EndAdd (IAsyncResult res);
D) [OperationContract]int BeginAdd(int num1, int num2, AsyncCallback cb, object state);IAsyncResult EndAdd ();

5. You are creating a client application by using Microsoft .NET Framework 3.5. The application will be accessible on the Internet.
You plan to use the wsHttpBinding binding by using HTTPS. The Windows Communication Foundation (WCF) service is hosted by a Windows service. You associate the HTTPS port of the WCF server with an X.509 certificate.
You need to ensure that the client application trusts and validates the certificate.
What should you do?

A) Subscribe to the ServerCertificateValidationCallback event of the System.Net.ServicePointManager class.
Write the validation code in the boolValidate(object sender, X509Certificate cert, X509Chain chain. System.Net.Security .SslPolicyErrors error) event handler on the server side.
B) Subscribe to the ServerCertificateValidationCallback event of the System.Net.ServicePointManager class.
Write the validation code in the boolValidate(object sender, X509Certificate cert, X509Chain chain. System.Net.Security.SslPolicyErrors error) event handler on the client side.
C) Derive a class from the System.IdentityModel.Selectors.X509CertificateValidator class.
Create an instance of the derived class on the client side.
Write the validation code in the public override void Validate(X509Certificate2 certificate) method.
D) Derive a class from the System.IdentityModel.Selectors.X509CertificateValidator class.
Create an instance of the derived class on the server side.
Write the validation code in the public override void Validate(X509Certificate2 certificate) method.

Solutions: