You develop a Window Communication Foundation (WCF) service. You have the following requirements: - Create a data contract to pass data between client applications and the service. - Create the data that is restricted and cannot pass between client applications and
the service. You need to implement the restricted data members. Which member access modifier should you use?

• A. Protected
• B. Shared
• C. Public
• D. Private

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
  Return New FaultException()
  End If
  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
  Throw New FaultException()
  End If
  Return Nothing
  End Function

You have an existing Windows Communication Foundation (WCF) Web service.
The Web service is not responding to messages larger than 64 KB.
You need to ensure that the Web service can accept messages larger than 64 KB without
generating errors.
What should you do?

• A. Increase the value of maxBufferPoolSize on the endpoint binding.
• B. Increase the value of maxReceivedMessageSize on the endpoint binding.
• C. Increase the value of maxBufferSize on the endpoint binding.
• D. Increase the value of maxRequestLength on the httpRuntime element.

You are developing a windows Communication Foundation (WCF) service that will be hosted in Microsoft Intemnet Information Services (IIS) 7.0.
The service must be hosted in an lIs application named Info. You need to enable this senvice to be hosted in llS by changing the web.config file
Which XML segment should you add to the web.config file?

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