A service implements the following contract. (Line numbers are included for reference only.)

The service is implemented as follows.

ContosoService uses NetMsmqBinding to listen for messages. The queue was set up to use transactions for adding and removing messages.
You need to ensure that OperationOne and OperationTwo execute under the same transaction context when they are invoked in the same session.
What should you do?

• A. Insert the following attribute to OperationOne on IContosoService.
  <TransactionFlow(TransactionFlowOption.Mandatory)>
  Insert the following attribute to OperationTwo on IContosoService.
  <TransactionFlow(TransactionFlowOption.Mandatory)>
• B. Add the following XML segment to the application config file in the
  system.serviceModel/bindings configuration section.
  <netMsmqBinding>
  <binding name="contosoTx" durable="true" receiveContextEnabled="true" />
  </netMsmqBinding>
  Then use the NetMsmqBinding named contosoTx to listen for messages from the clients.
• C. Insert the following attribute to OperationOne on ContosoService.
  <OperationBehavior(
  TransactionScopeRequired:=True,
  TransactionAutoComplete:=False)>
  Insert the following attribute to OperationTwo on ContosoService.
  <OperationBehavior
  (TransactionScopeRequired:=True,
  TransactionAutoComplete:=True)>
• D. Add the following XML segment to the application config file in the
  system.serviceModel/bindings configuration section.
  <customBinding>
  <binding name="contosoTx">
  <transactionFlow />
  <binaryMessageEncoding />
  <msmqTransport durable="true" />
  </binding>
  </customBinding>
  Then use the CustomBinding named contosoTx to listen for messages from the clients.

You are developing a Windows Communication Foundation (WCF) service. One of the parameters used with the service operations is a security token. The security token is not sensitive. The monitoring software tracks security tokens and can read tokens in clear text only.
The company security policy requires that you validate all clear text data passed over the corporate network.
You need to ensure that the service verifies that the security token is not changed during transit.
What should you do?

• A. For all the security-sensitive members, set the ProtectionLevel parameter of the MessageBodyMember or MessageHeader attribute to EncryptAndSign.
• B. Implement IEndpointldentityProvider in the message contract class.
• C. Implement ISecureConversationSession in the message contract class.
• D. For all the security-sensitive members, set the ProtectionLevel parameter of the MessageBodyMember or MessageHeader attribute to Sign.

A Windows Communication Foundation (WCF) client communicates with a service. You created the client proxy by using Add Service Reference in Microsoft Visual Studio.
You need to ensure that the client accepts responses of up to 5 MB in size.
What should you change in the configuration file'?

• A. the value of the maxBytesPerRead attribute to 5242880
• B. the value of the maxBufferSize attribute to 5242880
• C. the value of the maxReceivedMessageSize attribute to 5242880
• D. the value of the maxBufferPoolSize attribute to 5242880

A Windows Communication Foundation (WCF) service has the following contract.
[ServiceContract] public class ContoaServicea { [OperationContract] [TransactionFlow(TransactionFlowOperation. Mandatory)]
[OperationBehavior(TraisactionScopeRequired true,
TransactionAutoCorrolete = false)
void TxOp 1 (string value) { ) [OperationCortract(lsTerminating-true)J
[TransactionFlow(TransactionFlowOption Mandatory)] [OperationBehavior(TraisactionScopeRequired true,
TransationAutoCormplete = false)]
void TxOp2(string value) {.. OperationContext. Current. SetTransactionCompleteO;
)
)
The rvice and the clients that call the service use NetTcpBinding with transaction flow enabled
You need to configure the service so that when TxOpl and TxOp2 are invoked under the same client session, they run under the same transaction context.
What should you do?

• A. Update the service contract to read as follows.
  [ServiceContract(SessionMode = SessionModeAllowed)] Add the following behavior to the
  service implementation.
  [ServiceBehavior(LnstanceContextMode = Instance ContextMode Single,
  ReleaseServicelnstanceQnTransactionComplete false)]
• B. Update the service contract to read as follows.
  (ServiceContract(SessionMode SessionMode Required)J Add the following behavior to the
  service implementation
  [ServiceBehavior(lnstanceCoritextMode = Instance ContextMode. PerSession)]
• C. Update the service contract to read as follows
  [ServiceContract(SessionMode = SessionMode.Allowed)] Add the following behavior to the
  service implementation.
  [ServiceBehavior(lnstanceContextMode Instance ContextMode. Single)]
• D. Update the service contract to read as follows.
  [ServiceContract(SessionMode = SessionMode.Required)]Md the following behavior to the
  service implementation.
  [ServiceBehavior(lnstanceContextMode = lnstanceContextMode. PerCall)]