You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. The WCF service must authenticate the client applications by validating credit card numbers and expiry dates.
You write the following code segment. (Line numbers are included for reference only.)

You need to implement custom authentication for the WCF service. Which code segment should you insert at line 10?

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

You create a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. The WCF service accepts service requests from different partner applications. One of the partner applications occasionally receives faults. You need to identify why the service is generating faults. You must accomplish this goal without interrupting the service. What should you do?

• A. Run SvcTraceViewer.exe /register on the WCF server.
• B. Connect remotely to the WCF service by using a debugger. Place breakpoints in the
  exception handling code segment.
• C. Configure the Service Tracing options in the application configuration file. Analyze the
  trace results by using the SvcTraceViewer.exe program.
• D. Add the following code segment to the application configuration file.
  <system.diagnostics>
  <switches>
  <add name="WcfFaultTrace" value="Error" />
  </ switches>
  </system.diagnostics>

You are creating an application by using Microsoft .NET Framework 3.5. You use Windows Communication Foundation (WCF) to create the application. The YourUserNamePasswordValidator class is implemented in the host application of the WCF service. The host application is named YourServiceHost.exe. You write the following code segment.
namespace YourSecureService
{
class YourUserNamePasswordValidator : UserNamePasswordValidator {
public override void Validate(string userName, string password)
{
...
}}
}
You need to perform custom validation of the user name and password by using the YourUserNamePasswordValidator class. What should you do?

• A. Set the wsHttpBinding binding in the following manner. <security mode="Message">
  <transport
  clientCredentialType="UserName" /></security> Set the service behavior by using the
  following credentials.
  <userNameAuthentication
  customUserNamePasswordValidatorType="YourUserNamePasswordValidator,
  YourServiceHo st" userNamePasswordValidationMode="Custom"/>
• B. Set the netTcpBinding binding in the following manner. <security mode="Transport">
  <transport
  clientCredentialType="UserName" /></security> Set the service behavior by using the
  following credentials.
  <userNameAuthentication customUserNamePasswordValidatorType="YourSecureService.
  YourUserNamePasswordValid ator " userNamePasswordValidationMode="Custom"/>
• C. Set the wsHttpBinding binding in the following manner. <security mode="Message">
  <message
  clientCredentialType="UserName" /></security> Set the service behavior by using
  thefollowing credentials.
  <userNameAuthentication
  customUserNamePasswordValidatorType="YourSecureService.YourUserNamePasswordV
  alid ator"
  userNamePasswordValidationMode="Custom"/>
• D. Set the wsHttpBinding binding in the following manner. <security mode="Message">
  <message
  clientCredentialType="UserName" /></security> Set the service behavior by using the
  following credentials.
  <userNameAuthentication customUserNamePasswordValidatorType="YourSecureService.
  YourUserNamePasswordValid a or,YourServiceHost"
  userNamePasswordValidationMode="Custom"/>

You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You host the service in a Web application named ExamService. You create a service extension file called ExamService.svc. You add the following code fragment to the web.config file.

You need to create a client proxy by referencing the service's metadata. Which address should you reference?

• A. http: //<machinename>/ExamService/mex
• B. http: //<machinename>/ExamService
• C. http: //<machinename>/ExamService/ExamService.svc/mex
• D. http: //<machinename>/ExamService/mex/ExamService.svc