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

1. You are creating a client application by using Microsoft .NET Framework 3.5. You use Windows Communication Foundation (WCF) to create the application.
The client application uses a Personal Information Card to provide authentication information to the WCF server. You write the following code fragment. (Line numbers are included for reference only.)

You need to ensure that one of the claims in the Personal Information Card contains an e-mail address.
Which code fragment should you insert at line 05?

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

2. You are creating a client application that will call a Windows Communication Foundation service. The service was created by using Microsoft .NET Framework 3.5.
You write the following code segment.
[DataContract]
public class CreditCard {
private string cardNumber = 0; [DataMember] public string Name { get; set; } [DataMember] public string CardNumber { get { return cardNumber; } set { if (!IsValidCreditCardNumber(value)) { throw new ArgumentException("Invalid credit card number"); } cardNumber = value; } }
} You plan to share the validation logic between the client application and the WCF service.
You need to generate a client-side service proxy that includes the validation logic.
Which four tasks should you perform? (Each correct answer presents part of the solution. Choose four.)

A) In the Client project, use the Add Web Reference dialog box to reference the service.
B) In the Service project, add a reference to the Class Library project.
C) In the Client project, add a reference to the Class Library project.
D) In the Client project, use the Add Service Reference dialog box to reference the service.
E) In the Client project, use the Add Reference dialog box to add a project reference to the Service project.
F) Create a Class Library project for the DataContract classes.

3. You create a stateless, thread-safe service by using Microsoft .NET Framework 3.5. You use the Windows Communication Foundation model to create the service. Load testing reveals that the service does not scale above 1,000 concurrent users.
You discover that each call to the service instantiates a new service instance. You also discover that these service instances are expensive to create. You need to ensure that 5,000 concurrent users can access the service.
Which code segment should you use?

A) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode.PerCall ConcurrencyMode=ConcurrencyMode.Reentrant)]
B) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Multiple)]
C) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode.PerCall ConcurrencyMode=ConcurrencyMode.Multiple)]
D) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode. Single, ConcurrencyMode=ConcurrencyMode.Reentrant)]

4. You create a Windows Communication Foundation (WCF) application by using Microsoft Visual Studio 2008 and the .NET Framework 3.5. You create a WCF service by using the following code segment. (Line numbers are included for reference only.)
01 [ServiceContract]
02 public interface IContosoService
03 {
04 [OperationContract]
06 void ProcessTransaction();
07 }
09 public class ContosoService : IContosoService
10 {
11 public void ProcessTransaction() {
12 try {
13 BusinessComponent.ProcessTransaction();
14 }
15 catch (ApplicationException appEx) {
17 }
18 }
19 }
The BusinessComponent.ProcessTransaction method will only throw exceptions from the ApplicationException type. You plan to debug the WCF service. You need to ensure that the WCF service meets the following requirements:
Detailed exception information is provided to the client application. Subsequent calls can be issued to the service by using the same proxy intance after an exception is caught in the client application. What should you do?

A) Add the following code segment at line 08.
[ServiceBehavior(IncludeExceptionDetailInFaults=true)] Add the following code segment at
line 16. throw appEx;
B) Add the following code segment at line 05. [FaultContract(typeof(ApplicationException))]
Add the following code segment at line 16. throw new
FaultException<ApplicationException>(appEx);
C) Add the following code segment at line 05. [FaultContract(typeof(ApplicationException))]
Add the following
code segment at line 16. throw appEx;
D) Add the following code segment at line 08.
[ServiceBehavior(IncludeExceptionDetailInFaults=true)] Add the following code segment at
line 16. throw new FaultException<ApplicationException>(appEx);

5. You are creating a client application by using Microsoft .NET Framework 3.5. The client application will consume a COM+ application by using the Windows Communication Foundation service.
You write the following code segment to implement the COM+ application.

You need to configure the WCF service to access the COM+ application from the WCF client application.
Which code fragment should you use?

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

Solutions: