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Microsoft 070-513 Exam Syllabus Topics:

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

1. 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
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
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 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
C) 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
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
Return New FaultException()
End If
End Function

2. 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 performanceCounters property to ServiceOnly.
B) Enable the Windows Management Instrumentation (WMI) provider.
C) In the service configuration diagnostics section, set the value of the performancCounters property to All.
D) Enable message logging for the endpoint.

3. A Windows Communication Foundation (WCF) solution uses two services to manage a shopping cart. Service
A processes messages containing line items that total between $0 and $500. Service B processes messages containing line items that total more than $500.
All messages are of equal importance to the business logic.
You need to route incoming messages to the appropriate services by using WCF routing.
Which two message filters should you add to the router? (Each correct answer presents part of the solution. Choose two.)

A) a message filter with a priority of 100 that will forward all messages to Service B
B) a message filter with a priority of 0 that will forward messages that total between $0 and $500 to Service A
C) a message filter with a priority of 0 that will forward all messages to Service B
D) a message filter with a priority of 100 that will forward messages that total between $0 and $500 to Service A

4. You are maintaining a Windows Communication Foundation (WCF) service that uses a custom UserNamePassword class to authenticate clients. The service certificate is hosted in the deployment server store for trusted root certificate authorities and has a Subject value of TaxServiceKey. Other service certificates hosted on the server also use TaxServiceKey as a Subject value.
You need to ensure that the service identifies itself with a certificate whose subject name and distinguished names are TaxServiceKey.
Which code segment should you use?

A) HostInstance.Credentials.ServiceCertificate.SetCertificate
(StoreLocation.LocalMachine, StoreName.AuthRoot,
X509FindType.FindBySubjectName, "CN=TaxServiceKey")
B) HostInstance.Credentials.ServiceCertificate.SetCertificate
(StoreLocation.LocalMachine, StoreName.My,
X509FindType.FindBySubjectDistinguishedName,
"CN=TaxServiceKey")
C) HostInstance.Credentials.ServiceCertificate.SetCertificate
(StoreLocation.LocalMachine, StoreName.My,
X509FindType.FindBySubjectName,
"CN=TaxServiceKey")
D) HostInstance.Credentials.ServiceCertificate.SetCertificate
(StoreLocation.LocalMachine, StoreName.Root,
X509FindType.FindBySubjectDistinguishedName,
"CN=TaxServiceKey")

5. You are developing a Windows Communication Foundation (WCF) service to provide shopping cart support. ASP.NET compatibility mode is not enabled.
The shopping cart information must be retained across user visits to the store until the user explicitly empties the cart or submits the cart contents to order.
You need to implement the service as a DurableService.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Create the persistence provider database and configure the persistenceProvider element of the service behavior to point to that database.
B) Use wsHttpContextBinding for both the client application and the service.
C) In the method to add an item to the shopping cart, serialize the shopping cart contents after adding the current item and storing it in a Session variable.
D) Use basicHttpBinding for both the client application and the service.

Solutions: