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Question 1:
A Windows Communication Foundation (WCF) service that handles corporate accounting must be changed to comply with government regulations of auditing and accountability
You need to configure the WCF service to execute under the Windows logged-on identity of the calling application.
What should you do?
A. Within the service configuration, add a ServiceAuthorization behavior to the service, and set ImpersonateCallerForAulOperations to true.
B. Within the service configuration, add a ServiceAuthenticationManager behavior to the service, and set ServiceAuthenticationManagerType to Impersonate.
C. Within the service configuration, add a serviceSecurityAudit behavior to the service, and set serviceAuthorizationAuditLevel to SuccessOrFailure
D. Within the service configuration, add a ServiceCredentials behavior to the service, and set type to Impersonate
Correct Answer: A
Question 2:
A Windows Communication Foundation (WCF) service is self-hosted in a console application. The service implements the IDataAccess contract, which is defined in the MyApplication namespace.
The service is implemented in a class named DataAccessService, which implements the IDataAccess interface and also is defined in the MyApplication namespace.
The hosting code is as follows. (Line numbers are included for reference only.)
You need to create a ServiceHost instance and assign it to the host variable. You also need to instantiate the service host. Which line of code should you insert at line 04?
A. host = New ServiceHost(“MyApplication.DataAccessService”)
B. host = New ServiceHost(“MyApplication.IDataAccess”)
C. host = New ServiceHost(GetType(IDataAccess))
D. host = New ServiceHost(GetType(DataAccessService))
Correct Answer: D
Question 3:
You are developing a Windows Communication Foundation (WCF) service.
You need to enable security auditing for all events.
What should you do?
A. Set the serviceAuthorizationAuditLevel setting to Success and the messageAuthenticationAuditLevel setting to Success.
B. Set the messageAuthenticationAuditLevel setting to Success and the auditLogLocation setting to Application.
C. Set the serviceAuthorizationAuditLevel setting to SuccessAndFailure and the messageAuthenticationAuditLevel setting to SuccessAndFailure.
D. Set the messageAuthenticationAuditLevel setting to SuccessAndFailure and the auditLogLocation setting to Security.
Correct Answer: C
Question 4:
You are developing a Windows Communication Foundation (WCF) service. You write a method named Submit that accepts messages of the type System.ServiceModel.Channels.Message.
You need to process the body of the incoming messages multiple times in the method.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
A. Use the GetBody method of the Message class to read the content of the messages.
B. Use the CreateBufferedCopy method of the Message class to load the messages into memory.
C. Use the WriteBodyContents method of the BodyWriter class to make a copy of the messages.
D. Use the CreateMessage method of the MessageBuffer class to make a copy of the messages.
Correct Answer: BD
Question 5:
You have a secured Windows Communication Foundation (WCF) service.
You need to track unsuccessful attempts to access the service.
What should you do?
A. Set the serviceAuthorizationManagerType attribute of the serviceAuthorization behavior to Message.
B. Set the includeExceptionDetaillnFaults attribute of the serviceDebug behavior to true.
C. Set the Mode attribute of the security configuration element to Message.
D. Set the messageAuthenticationAuditLevel attribute of the serviceSecurityAudit behavior to Failure.
Correct Answer: D
Question 6:
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. serviceAuthenticationManager
B. serviceAuthorization
C. serviceCredentials
D. serviceSecurityAudit
Correct Answer: D
Question 7:
You are using tracing to diagnose run-time issues when you look at the traces for the service in Svc Trace viewer exe, you see what is shown in the exhibit (Click the Exhibit button)
The exception trace is selected in Svc Trace reviewer exe.
You need to interpret the trace results to determine where the error occurred and what to do next.
What should you do?
A. This issue occurred in the ServiceHost during ServiceHost Open. Enable WMI by adding the following configuration to the system.serviceModel configuration section in the application configuration file Restart the application and inspect the endpoints visible through WMI
B. This issue occurred in the Service Host during Service Host. Open. Compare the security settings for any endpoints that use an MSMQ transport to the security configuration of the MSMQ queue used by the endpoint
C. This issue occurred at the Service Host when receiving a message Compare the security configurations on the client and server to make sure that they are compatible
D. This issue occurred at the ServiceHost when accepting an initial set of messages from MSMQ.Log all messages sent between the clients and sever.
Correct Answer: B
Question 8:
You need to modify a client application that consumes a Windows Communication Foundation (WCF) service.
The service metadata is no longer available.
You need to modify the previously generated proxy to include asynchronous calls to the service.
What should you do?
A. Update the service reference with the Generate asynchronous operations option.
B. Create a partial class for the previously generated proxy and include the new asynchronous methods.
C. Create a class with the same name as the previously generated proxy and add the new asynchronous methods. Add the new class to a namespace that is different from the original proxy.
D. Create a class with the same name as the previously generated proxy and add the new asynchronous methods as partial methods. Add the new class to a namespace that is different from the original proxy.
Correct Answer: B
Question 9:
A Windows Communication Foundation (WCF) service handles online order processing for your company.
You discover that many requests are being made with invalid account numbers.
You create a class named AccountNumberValidator that has a method named Validate.
Before the message is processed, you need to validate account numbers with AccountNumberValidator and reject messages with invalid account numbers.
You create a new class that implements the IParameterInspector interface.
Which code segment should you use in this class?
A. public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState) { string accountNumber = GetAccountNumber(outputs); var validator = new AccountNumberValidator(); if(!validator.Validate(accountNumber)) { throw new FaultException(); } } public object BeforeCall(string operationName, object[] inputs) { return null; }
B. public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState) { return; } public object BeforeCall(string operationName, object[] inputs) { string accountNumber = GetAccountNumber(inputs); var validator = new AccountNumberValidator(); if (!validator.Validate(accountNumber)) { throw new FaultException(); } return null;}
C. public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState) { string accountNumber = GetAccountNumber(outputs); var validator = new AccountNumberValidator(); if(!validator.Validate(accountNumber) } { returnValue = new FaultException(); } } public object BeforeCall(string operationName, object[] inputs) { return null; }
D. public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState) { return; } public object BeforeCall(string operationName, object[] inputs) { string accountNumber = GetAccountNumber(inputs); var validator = new AccountNumberValidator(); if (!validator.Validate(accountNumber)) { return new FaultException(); } }
Correct Answer: B
Question 10:
A Windows Communication Foundation (WCF) client configuration file contains the following XML segment in the system.serviceModel element.
<endpoint address=" net.tcp://server/ContosoService "
binding=” netTcpBinding ”
contract=” Contoso. IContosoService ”
name=” netTcp ” / >
<endpoint address=" net.pipe://localhost/ContosoService "
binding=” netNamedPipeBinding ”
contract=” Contoso. IContosoService ”
name=” netPipe ” />
You need to create a channel factory that can send messages to the endpoint listening at net.pipe://localhost/ContosoService.
Which code segment should you use
A. ChannelFactory factory = new ChannelFactory (” Contoso. IContosoService “);
B. ChannelFactory factory = new ChannelFactory (” netNamedPipeBinding “);
C. ChannelFactory factory = new ChannelFactory (” netPipe “);
D. ChannelFactory factory = new ChannelFactory (” net.pipe://localhost/ContosoService “);
Correct Answer: C
Question 11:
You are developing a Windows Communication Foundation (WCF) service.
You must record all available information for the first 1,000 messages processed, even if they are malformed.
You need to configure the message logging section of the configuration file. Which configuration segment should you use?
A.
B.
C.
D.
Correct Answer: A
Question 12:
You are developing a Windows Communication Foundation (WCF) service. The following code defines and implements the service. (Line numbers are included for reference only.)
You need to ensure that two identical copies of the received message are created in the service.
Which code segment should you insert at line 14?
A. Dim msgCopy As Message = TryCast( TryCast(message.CreateBufferedCopy(8192), Object), Message) Dim returnMsg As Message = TryCast( TryCast(message.CreateBufferedCopy(8192), Object), Message)
B. Dim buffer As MessageBuffer = message. CreateBufferedCopy(8192) Dim msgCopy As Message = buffer.CreateMessage() Dim returnMsg As Message ?msgCopy
C. Dim msgCopy As Message = message Dim returnMsg As Message = message
D. Dim buffer As MessageBuffer = message. CreateBufferedCopy(8192) Dim msgCopy As Message = buffer.CreateMessage() Dim returnMsg As Message = buffer.CreateMessage()
Correct Answer: B
Question 13:
You are developing a client that sends several types of SOAP messages to a Windows Communication
Foundation (WCF) service method named PostData PostData is currently defined as follows
Sub PostData(Byval data As Order) You need to modify PostData so that it can receive any SOAP message.
Which code segment should you use?
A. Sub PostData(ByVal data As Order)
B. OperationContract(lsOneway: zTrue, Action:z\’-\’, ReplyAction: z”-\’)> Sub PostData(ByVal data As BodyWriter)
C. Sub PostData(Byval data As BodyWriter)
D. Sub PostData(ByVal data As Message)
Correct Answer: A
Question 14:
You are developing a client application that uses the following code to consume a Windows Communication Foundation (WCF) service. (Line numbers are included for reference only.)
01 Dim myBinding As BasicHttpBinding = New BasicHttpBinding()
02 Dim myEndpointAddress As EndpointAddress = New EndpointAddress(“http://contoso.com/TaxService.svc”)
04 Dim client As ITaxService = channelFactory.CreateChannel()
05 Dim data As String = client.GetData(1)
You need to consume the service.
Which code segment should you insert at line 03?
A. Dim channelFactory = New ChannelFactory(Of ITaxService)()
B. Dim channelFactory = New ChannelFactory(Of ITaxService)(myBinding)
C. Dim channelFactory = New ChannelFactory(Of ITaxService) (myBinding, myEndpointAddress)
D. channelFactory = New ChannelFactory(Of ITaxService) (“http://contoso.com/TaxService.svc”)
Correct Answer: C
Question 15:
You are developing an application to update a users social status. You need to consume the service using Windows Communication Foundation (WCF).
The client configuration is as follows.
<transport clientCredentialType="Basic"
realm=”Social API” />
<endpoint address="http://contoso.com"
binding=”webHttpBinding”
bindingConfiguration=”SocialConfig”
contract=”ISocialStatus”
name=”SocialClient” />
The service contract is defined as follows.
[ServiceContract] public interface ISocialStatus {
[OperationContract]
[WebInvoke(UriTemplate =
“/statuses/update.xml?status={text}”)]
void UpdateStatus(string text);
}
Which code segment should you use to update the social status?
A. using (WebChannelFactory factory = new WebChannelFactory(“SocialClient”)) { factory.Credentials.UserName.UserName = user.Name; factory.Credentials.UserName.Password = user.Password; ISocialStatus socialChannel = factory.CreateChannel(); socialChannel.UpdateStatus(newStatus); }
B. using (ChannelFactory factory = new WebChannelFactory(typeof(ISocialStatus))) { factory.Credentials.UserName.UserName = user.Name; factory.Credentials.UserName.Password = user.Password; ISocialStatus socialChannel = factory.CreateChannel(); socialChannel.UpdateStatus(newStatus); }
C. using (ChannelFactory factory = new ChannelFactory(“POST”)) { factory.Credentials.Windows.ClientCredential.UserName = user.Name; factory.Credentials.Windows.ClientCredential.SecurePassword. SetAt(0, Convert.ToChar(user.Password) ); ISocialStatus socialChannel = factory.CreateChannel(); socialChannel.UpdateStatus(newStatus); }
D. using (WebChannelFactory factory = new WebChannelFactory(typeof(ISocialClient))) { factory.Credentials.Windows.ClientCredential.UserName = user.Name; factory.Credentials.Windows.ClientCredential.SecurePassword. SetAt(0, Convert.ToChar(user.Password) ); ISocialStatus socialChannel = factory.CreateChannel(); socialChannel.UpdateStatus(newStatus); }
Correct Answer: A
