You create a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. You need to enable WCF tracing at runtime by using Windows Management Instrumentation (WMI). Which three tasks should you perform? (Each correct answer presents part of the solution. Choose three.)

• A. Set the performanceCounters attribute to ServiceOnly in the configuration file.
• B. Set up a System. ServiceModel trace listener in the configuration file. Set all trace properties to false.
• C. Set up a message log listener in the configuration file. Set all trace properties to false.
• D. Set the wmiProviderEnabled attribute to true in the configuration file.
• E. Use WMI to set the AppDomainlnfo trace properties to true.

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( _ ReleaselnstanceMode:=ReleaselnstanceMode.None)> _
• B. <OperationBehavior(_ ReleaselnstanceMode:=ReleaselnstanceMode.BeforeCall>
• C. <OperationBehavior(TransactionScopeRequired:=True)> _
• D. <OperationBehavior(AutoDisposeParameters:=True)> _

You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You need to ensure that the service logs only messages that do not conform to the message contract.
Which code fragment should you use?

• A. Option A
• B. Option D
• C. Option C
• D. Option B

Your company has a set of e-commerce services that were created by using Microsoft .NET Framework 3.5. The Windows Communication Foundation model was used to create the services.
The services include a catalog and a shopping cart that are deployed to the same physical server. The catalog is a stateless, single-instance service. The shopping cart is a reentrant, per-session service.
The catalog service contains the following code fragment.

The shopping cart service contains the following code fragment.

During peak hours, the number of simultaneous catalog requests increase. This prevents customers from updating their shopping carts. You need to ensure that the customers can update their shopping carts even during peak catalog request traffic.
Which set of code fragments should you use to replace the existing code fragments?

• A. Option A
• B. Option D
• C. Option C
• D. Option B

You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You write the following code segment to define the service. (Line numbers are included for reference only.)

You need to set the ServiceContract attribute for the transaction behavior of the service. Which code segment should you insert at line 01?

• A. <ServiceContract(SessionMode:=SessionMode.Allowed, _ ProtectionLevel:=ProtectionLevel.EncryptAndSign)> _
• B. <ServiceContract(SessionMode:=SessionMode.Allowed)> _
• C. <ServiceContract(SessionMode:=SessionMode.Required)> _
• D. <ServiceContract(SessionMode:=SessionMode.NotAllowed, _ ProtectionLevel:=ProtectionLevel.EncryptAndSign)> _