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Microsoft TS: Windows Communication Foundation velopment with Microsoft .NET Framework 4 Sample Questions:

1. You are developing a Windows Communication Foundation (WCF) service that is hosted by a Windows Forms application.
The ServiceHost instance is created in the Form constructor.
You need to ensure that the service is not blocked while the UI thread is busy.
What should you do?

A) Decorate the service implementation class with the following line of code.
[ServiceBehavior(
ConcurrencyMode = ConcurrencyMode.Multiple)]
B) Decorate the service implementation class with the following line of code.
[ServiceBehavior(
UseSynchronizationContext = false)]
C) Call the BeginInvoke method of the form and supply a delegate.
D) Call the Invoke method of the form and supply a delegate.s

2. You are creating a Windows Communication Foundation (WCF) service that accepts claims-based tokens.
You need to ensure that the service can use claims from trading partners even though there are variations on naming for the same elements.
Which two actions should you perform? (Each correct answer presents part of the solution Choose two.)

A) Register a custom Service Authorization Manager that implements Check Access In this method, use System. Convert. Change Type to transform the incoming claim set to a Windows Claim Set type.
B) Register an Authorization Policy that maps external claims to an internal Claim Set.
C) Apply a Principal Permission attribute on the operation with the required claims listed in the Roles property.
D) Within the operation, verify the presence of the required claims in the current Authorization Context

3. You are implementing a Windows Communication Foundation (WCF) service contract named IContosoService in a class named ContosoService. The service occasionally fails due to an exception being thrown at the service.
You need to send the stack trace of any unhandled exceptions to clients as a fault message.
What should you do?

A) For each OperationContract exposed by IContosoService , apply the following attribute. <FaultContract(GetType(Exception))>
B) Apply the following attribute to the ContosoService class. <ServiceBehavior(IncludeExceptionDetailInFaults:=True)>
C) In the application configuration file on the client, add the following XML segment to the
system.serviceModel/behaviors configuration section group.
<endpointBehaviors>
<behavior name=" debug ">
< callback Debug includeExceptionDetailInFaults="true" />
</behavior>
</endpointBehaviors>
Associate the debug behavior with any endpoints that need to return exception details.
D) In the application configuration file on the service and all the clients, add the following
XML segment to the system.diagnostics/sources configuration section group.
<source name="System.ServiceModel" switchValue=" Error " propagateActivity="true">
<listeners>
<add name="ServiceModelTraceListener"
initializeData="app_tracelog.svclog"
type="System.Diagnostics.XmlWriterTraceListener" />
</listeners>
</source>

4. A Windows Communication Foundation (WCF) service is required to log all authorization attempts to the Windows Event Log.
You need to configure a behavior and apply it to the service to support this requirement.
Which behavior should you configure and apply?

A) serviceAuthorization
B) serviceAuthenticationManager
C) serviceSecurityAudit
D) serviceCredentials

5. You have an existing Windows Communication Foundation (WCF) service.
You need to ensure that other services are notified when the service is started.
What should you do?

A) Add the following standard endpoint to the service.
<endpoint name="udpAnnouncementEndpoint"
kind="udpDiscoveryEndpoint" />
B) Add the following standard endpoint to the service.
<endpoint name="udpDiscoveryEndpoint"
kind="udpAnnouncementEndpoint" />
C) Add a service behavior with the following element.
<serviceDiscovery>
<announcementEndpoints>
<endpoint kind="udpAnnouncementEndpoint" />
</announcementEndpoints>
</serviceDiscovery>
D) Add a service behavior with the following element.
<serviceDiscovery>
<announcementEndpoints>
<endpoint kind="udpDiscoveryEndpoint" />
</announcementEndpoints>
</serviceDiscovery>

Solutions: