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| Section | Objectives |
|---|---|
| Service Implementation and Hosting | - Configuring service behavior and metadata exposure - Implementing service contracts in C# using .NET Framework 3.5 - Hosting WCF services in managed applications, IIS and WAS |
| Windows Communication Foundation Fundamentals | - Bindings, endpoints, and host configuration - Service contracts, data contracts, and message contracts - Understanding WCF architecture and programming model |
| Security, Transactions and Reliability | - Transactions, concurrency and instance management - Reliable messaging and error handling - Configuring security (transport and message level) |
| Client Configuration and Communication | - Bindings and interoperability considerations - Creating and configuring WCF client applications - Channel factories and proxy generation |
Question 1
You are creating a Windows Communication Foundation (WCF) client application by using Microsoft .NET Framework 3.5.
The application uses the XML data format to exchange data with the service.
You plan to change the data format to JavaScript Object Notation (JSON).
You need to ensure that the client application can access the JSON WCF service.
What should you do?
A. Option C
B. Option D
C. Option B
D. Option A
Question 2
You are creating a remote database management application by using Microsoft Windows Forms and Microsoft .NET Framework 3.5. You use the Windows Communication Foundation model to create the application.
You write the following code segment. (Line numbers are included for reference only.)
01 Public Class ()ueryAnalyzerService 02 Implements IQueryAnalyzerService, IDisposable
04 Public Sub Open() 05 ...
06 End Sub 07 Public Sub ExecuteSql(ByVal sql As String) 08...
09 End Sub
10 Public Sub Close()
11 ...
12 End Sub
13 Public Sub Dispose() Implements IDisposable.Dispose 14...
15 End Sub 16...
17 End Class
You need to ensure that each time a client application calls the Open0 method, a new service instance is created. Which code segment should you insert at line 03?
A. <OperationBehavior(AutoDisposeParameters:=True)> _
B. <OperationBehavior( _ ReleaselnstanceMode:=ReleaselnstanceMode.None)> _
C. <OperationBehavior(TransactionScopeRequired:=True)> _
D. <OperationBehavior(_ ReleaselnstanceMode:=ReleaselnstanceMode.BeforeCall>
Question 3
You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You write the following code segment.
You need to ensure that when the MyMethod method is called, the service is the root of a transaction. Which code segment should you insert at line 09?
A. [OperationBehavior(TransactionScopeRequired=false)] [TransactionFlow(TransactionFlowOption.NotAllowed)]
B. [OperationBehavior(TransactionScopeRequired=false)] [TransactionFlow(TransactionFlowOption.Mandatory)]
C. [OperationBehavior(TransactionScopeRequired=true)] [TransactionFlow(TransactionFlowOption.Allowed)]
D. [OperationBehavior(TransactionScopeRequired=true)] [TransactionFlowfTransactionFlowOption.NotAllowed)]
Question 4
You are creating a distributed application by using Microsoft .NET Framework 3.5.
The application uses the Windows Communication Foundation model.
You need to ensure that the following requirements are met:
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
A. <bindings> <wsHttpBinding> <binding name="main"> <security
mode="TransportWithMessageCredential <message clientCredentialType="None"/>
</security> </binding> </wsHttpBindingx/bindings>
B. <bindings> <wsHttpBinding> <binding name="main"> <security
mode="TransportWithMessageCredential bindings>
C. <bindings> <wsHttpBinding> <binding name="main"> <security
mode="TransportWithMessageCredential <message clientCredentialType="None7>
</security> </binding> </wsHttpBindingx/bindings>
D. <bindings>
<netTcpBinding>
<binding name="main">
<security mode="TransportWithMessageCredential
<message clientCredentialType="Certificate7>
</security> </binding> </netTcpBinding></bindings>
> </security> </binding> </wsHttpBinding></
> transport clientCredentialType="Certificate" />
> transport clientCredentialType="Windows" />
> transport clientCredentialType="Certificate" />
Question 5
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 08.
[ServiceBehavior(IncludeExceptionDetailInFaults=true)] Add the following code segment at
line 16. throw new FaultException<ApplicationException>(appEx);
D. Add the following code segment at line 05. [FaultContract(typeof(ApplicationException))]
Add the following
code segment at line 16. throw appEx;
Solutions:
| Question 1 Answer: C | Question 2 Answer: D | Question 3 Answer: D | Question 4 Answer: B,D | Question 5 Answer: B |
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