TS: Windows Communication Foundation velopment with Microsoft .NET Framework 4 (070-513) Free Practice Test

Question 1

A Windows Communication Foundation (WCF) service is self-hosted in a console application. The service implements the ITimeService service interface in the TimeService class.
You need to configure the service endpoint for HTTP communication.
How should you define the service and endpoint tags?

A. Define the service tag as follows.
<service name=" TimeService ">
Define the endpoint tag as follows.
<endpoint address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService "/ >

B. Define the service tag as follows.
<service name=" TimeService ">
Define the endpoint tag as follows.
< endpoint kind=" TimeService "
address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService " / >

C. Define the service tag as follows.
<service name=" ITimeService ">
Define the endpoint tag as follows.
< endpoint name=" TimeService "
address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService "/ >

D. Define the service tag as follows.
<service name=" ITimeService " >
Define the endpoint tag as follows.
< endpoint kind =" TimeService "
address="http://localhost:8080/TimeService"
binding=" wsHttpBinding "
contract=" ITimeService"/ >

Correct Answer: A

Question 2

DRAG DROP
You have a client application that consumes a Windows Communication Foundation (WCF) service. The service contains a class named RegistrationService. The RegistrationService class contains two methods named SubmitRegistration and GetRegistrations.
The service has the following requirements:
- The client application must call the SubmitRegistration method synchronously.
- The client application must call the GetRegistrations method asynchronously.
You need to complete the client-side code to call the WCF service.
Which six code segments should you use in sequence? (To answer, move the appropriate six code segments from the list of code segments to the answer area and arrange them in the correct order.)

Correct Answer:

Question 3

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 Sub AfterCall(
ByVal operationName As String,
ByVal outputs() As Object,
ByVal returnValue As Object, ByVal correlationState As Object) _ Implements IParameterInspector.AfterCall Dim accountNumber As String = GetAccountNumber(outputs) Dim validator As AccountNumberValidator = New AccountNumberValidator() If (Not validator.Validate(accountNumber)) Then returnValue = New FaultException() End If End Sub Public Function BeforeCall( ByVal operationName As String, ByVal inputs() As Object) As Object _ Implements IParameterInspector.BeforeCall Return Nothing End Function

B. Public Sub AfterCall(
ByVal operationName As String,
ByVal outputs() As Object,
ByVal returnValue As Object,
ByVal correlationState As Object) _ Implements
IParameterInspector.AfterCall
Dim accountNumber As String = GetAccountNumber(outputs)
Dim validator As
AccountNumberValidator = New AccountNumberValidator()
If (Not validator.Validate(accountNumber)) Then
Throw New FaultException()
End If
End Sub
Public Function BeforeCall(
ByVal operationName As String,
ByVal inputs() As Object) As Object _
Implements IParameterInspector.BeforeCall
Return Nothing
End Function

C. Public Sub AfterCall(
ByVal operationName As String,
ByVal outputs() As Object,
ByVal returnValue As Object,
ByVal correlationState As Object) _
Implements IParameterInspector.AfterCall
Return
End Sub
Public Function BeforeCall(
ByVal operationName As String,
ByVal inputs() As Object) As Object _
Implements IParameterInspector.BeforeCall Dim accountNumber As String =
GetAccountNumber(inputs)
Dim validator As AccountNumberValidator =
New AccountNumberValidator()
If (Not validator.Validate(accountNumber)) Then
Return New FaultException()
End If
End Function

D. Public Sub AfterCall(
ByVal operationName As String,
ByVal outputs() As Object,
ByVal returnValue As Object,
ByVal correlationState As
Object) _
Implements IParameterInspector.AfterCall
Return
End Sub
Public Function BeforeCall(
ByVal operationName As String,
ByVal inputs() As Object) As Object _
Implements IParameterInspector.BeforeCall
Dim accountNumber As String = GetAccountNumber(inputs)
Dim validator As AccountNumberValidator = New AccountNumberValidator() If (Not
validator.Validate(accountNumber)) Then
Throw New FaultException()
End If
Return Nothing
End Function

Correct Answer: A

Question 4

You are creating a Windows Communication Foundation (WCF) service that responds using plain-old XML (POX).
You have the following requirements:
- You must enable the /catalog.svc/items operation to respond using the POX, JSON, or ATOM formats. You also must ensure that the same URL is used regardless of the result type.
- You must determine the response format by using the Accepts HTTP header.
What should you do?

A. Implement the System.Runtime.Serialization.IFormatterConverter interface in the service class.

B. Set the return type of the operation to System.ServiceModel.Channels.Message. Use the current WebOperationContext methods to return the data in the required format.

C. Set the BodyStyle parameter of the WebGet attribute on the operation to WebMessageBodyStyle.WrappedResponse.

D. Implement the IChannelInitializer interface in the service class.

Correct Answer: B

Question 5

Your company has a Windows Communication Foundation (WCF) service at the URL http://services.contoso.com/OrderLookupService.svc.
The <system.serviceModel> section of the configuration file is as follows. (Line numbers are included for reference only.)
01 <system.serviceModel> 02 <behaviors> 03 <serviceBehaviors> 04 <behavior> 05 <serviceDebug includeExceptionDetailInFaults="false"/>
07 </behavior>
08 </serviceBehaviors>
09 </behaviors>
10 <serviceHostingEnvironmentmultipleSiteBindingsEnabled="true" />
11 </system.serviceModel>
You need to ensure that the service publishes the WSDL description at http://services.contoso.com/OrderLookupService.svc?wsdl.
What should you do?

A. Insert the following element at line 06.
<serviceMetadata httpGetEnabled="false" />

B. Insert the following element at line 06.
<serviceDiscovery>
<announcementEndpoints>
<endpoint name="wsdlAnnouncement" kind="udpAnnouncementEndpoint" />
</announcementEndpoints>
</serviceDiscovery>

C. Change the serviceDebug element at line 05 as follows.
<serviceDebug includeExceptionDetailInFaults="true"/>

D. Insert the following element at line 06.
<serviceMetadata httpGetEnabled="true" />

Correct Answer: D

Question 6

You are developing a Windows Communication Foundation (WCF) service that executes a long-running operation.
The service is accessed from your business applications in a server transaction in which the client does not participate.
You need to ensure that the transaction times out and aborts if the operation has not completed within 45 seconds.
What should you do?

A. Apply OerviceBehavior (TransactlonTiitieout: = "00:00:45")> to the service
implementation.

B. Set the service binding receiveTimeout attribute to 00:00:45.

C. Set the service binding sendTimeout attribute to 00:00:45.

D. Apply <OperationBehavior (TransactionScopeRequired:=False) > to the service operation.

Correct Answer: A

Question 7

A Windows Communication Foundation (WCF) service is responsible for transmitting XML documents between systems.
The service has the following requirements:
- It must minimize the transmission size by attaching the XML document as is without using escape characters or base64 encoding. - It must interoperate with systems that use SOAP but are not built on the .NET platform.
You need to configure the service to support these requirements.
Which message encoding should you use?

A. MTOM (Message Transmission Optimization Mechanism) message encoding

B. Binary message encoding

C. Text message encoding with message version set to SOAP 1.2

D. Text message encoding with message version set to none

Correct Answer: A

Question 8

You are creating a Window s Communication Foundation (WCF) service application. The
application needs to service many clients and requests simultaneously. The application also needs to ensure subsequent individual client requests provide a stateful conversation.
You need to configure the service to support these requirements.
Which attribute should you add to the class that is implementing the service?

A. <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerCall, ConcurrencyMode:=ConcurrencyMode.Multiple)>

B. <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerSession, ConcurrencyMode:=ConcurrencyMode.Multiple)>

C. <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerSession, ConcurrencyMode:=ConcurrencyMode.Single)>

D. <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerCall, ConcurrencyMode:=ConcurrencyMode.Reentrant)>

Correct Answer: B

Question 9

You are creating a windows Communication Foundation (WCF) service to process orders.
The data contract for the order is defined as follows:
[DataContract]>
public class Order
{
[DataMemberl ()>
public string CardHolderName { get; set;
[DataMember] >
public string CreditCardNumber { get; set; }
)
You have the following requirements:
- Enable the transmission of the contents of Order from the clients to the service.
- Ensure that the contents of CreditCardNumber are not sent across the network in clear text.
- Ensure that the contents of CreditCardNumber are accessible by the service to process the order.
You need to implement the service to meet these requirements
What should you do?

A. Change the data type of CreditCardNumber from string to SecureString

B. Add a DataProtectionPermission attribute to the CreditCardNumber property and set the ProtectData property to true.

C. Implement the CreditCardNumber property getter and setter In the setter, run the value of the CreditCardNumber through the MD5CryptoServiceProvider class TransformBlock method

D. Convert the DataContract to a MessageContract and set the ProtectionLevel property to SignAndEncrypt

Correct Answer: D

Question 10

Your Windows Communication Foundation (WCF) client application uses HTTP to communicate with the service.
You need to enable message logging and include all security information such as tokens and nonces in logged messages.
What should you do?

A. In the machine configuration file, add the following XML segment to the
system.serviceModel configuration section.
<machineSettings enableLoggingKnownPii="true" />
In the application configuration file, add the logKnownPii attribute to the message logging
diagnostics source and set the value of the attribute to true. In the application configuration
file, add the following XML segment to the system.serviceModel configuration section
group.
<diagnostics>
<messageLogging logMessagesAtTransportLevel="true"/>
</diagnostics>

B. In the application configuration file, add the logKnownPii attribute to the message
logging diagnostics source and set the value of the attribute to true.
Generate the ContosoService class using the Add Service Reference wizard. Add a
reference to System.ServiceModel.Routing.dll.
Add the following code segment.
ContosoService client = new ContosoService();
SoapProcessingBehavior behavior = new SoapProcessingBehavior();
behavior.ProcessMessages = true;
client.Endpoint.Behaviors.Add(behavior);

C. In the machine configuration file, add the following XML segment to the
system.serviceModel configuration section.
<machineSettings enableLoggingKnownPii="true" />
Generate the ContosoService class using the Add Service Reference wizard.
Add the following code segment.
ContosoService client = new ContosoService();
client.Endpoint.Behaviors.Add(new CallbackDebugBehavior(true));

D. In the application configuration file, add the following XML segment to the
system.serviceModel configuration section group.
<diagnostics>
<messageLogging logMessagesAtTransportLevel="true"
logEntireMessage="true" />
</diagnostics>

Correct Answer: A

Question 11

You have a Windows Communication Foundation (WCF) service.
The service has issues with performance when it receives messages on a specific endpoint. The service must collect the minimum number of performance counters to diagnose the message issues.
You need to configure the service.
In the web.config file for the service, what should you do?

A. In the service configuration diagnostics section, set the value of the performancCounters property to All.

B. In the service configuration diagnostics section, set the value of the performanceCounters property to ServiceOnly.

C. Enable the Windows Management Instrumentation (WMI) provider.

D. Enable message logging for the endpoint.

Correct Answer: A

Question 12

You are creating a Windows Communication Foundation (WCF) service that is implemented as follows.
(Line numbers are included for reference only.)
01|ServiceContract]
02[ServiceBehavior (includeExceptionDetailslnFaults = true) 1
03putiic class OrderService
04{
05[Operation Contract]
06putiic void Submit Order (Order an Order)
07{
O8try
09{
10...
11)
12catch (DivideByZeroExcepton ex)
13{
15)
16)
17)
You need to ensure that the stack trace details of the exception are not included in the error information sent to the client.
What should you do?

A. After hne 05, add the following line. [FaultContract(typeof(FaukEception<Order>))J Replace line 14 with the following line throw ex;

B. Alter hne 05, add the following line [FaultContract(typeof(FaultException<Order>))J Replace line 14 with the following line. Throw new FaultException<Order>(anOrder, "Divide by zero exception"):

C. Replace line 14 with the following line. Throw:

D. Replace line 14 with the following line throw new FaultException<Order>(anOrder, ex.ToString(fl;

Correct Answer: B

Question 13

You create a Windows Communication Foundation (WCF) service.
You need to ensure that specific users can enable message logging for the service at runtime.
In the configuration file for the service, what should you do?

A. Enable a shared XMLTraceListener object.

B. Enable the Windows Management Instrumentation (WMI) provider.

C. Enable debug compilation.

D. Enable message logging.

Correct Answer: C

Question 14

DRAG DROP
You develop a Windows Communication Foundation (WCF) service that is hosted within a console application. The service implements the IRegistrationService interface in a class named RegistrationService.
You need to add code to the console application to host the WCF service.
How should you complete the relevant code? (To answer, drag the appropriate code segment to the correct location in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Correct Answer:

Question 15

A Windows Communication Foundation (WCF) service has the following contract.
[ServiceContract(Namespace="http://contoso.com")] public interface IShipping { [OperationContract] string DoWork(int id); }
This is one of several service contracts hosted by your application. All endpoints use SOAP
1.2 bindings with WS-Addressing 1.0. The System.ServiceModel.MessageLogging trace source in the system.diagnostics configuration section is configured with one listener.
You need to make sure that only the messages that are returned from the DoWork operation are logged.
Which XML segment should you add to the system.serviceModel/diagnostics/messageLogging/filters configuration element?

A. <add xmlns:addr="http://www.w3.org/2005/08/addressing"> //addr:Action[text() =
'http://contoso.com/IShipping/DoWork']
</add>

B. <add xmlns:addr="http://www.w3.org/2005/08/addressing"> //addr:Action[text() =
'http://contoso.com/IShipping/DoWorkResponse']
</add>

C. <add xmlns:soap="http://www.w3.org/2003/05/soap-envelope"> //soap:Action[text() =
'http://contoso.com/IShipping/DoWork']
</add>

D. <add xmlns:soap="http://www.w3.org/2003/05/soap-envelope"> //soap:Action[text() =
'http://contoso.com/IShipping/DoWorkResponse']
</add>

Correct Answer: B

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Microsoft TS: Windows Communication Foundation velopment with Microsoft .NET Framework 4 (070-513) Free Practice Test