70-513 (WCF) new question for Exam

 70-513 (WCF) new  question for Exam   :

Hi   recently  I have  give  the 70-513 Exam  in that  I found  these  question  :

You are creating a Windows Communication Foundation (WCF) service based on

WSHttpBinding.

New audit requirements dictate that callers must be authenticated on every call to ensure that

their credentials have not been revoked.

You need to ensure that the service will not cache the security request token. What should you

do?

A. Apply a ServiceBehavior attribute to the service implementation class with the

lnstanceContextMode property set to Single.

B. In the message security configuration, change clientCredentialType from lssuedToken to

UserName

C. In the message security configuration, set establishSecurityContext to false.

D. At the end of every operation, call the SessionStateUtility.RaiseSessionEnd method.

Correct Answer: C

You are creating a Windows Communication Foundation (WCF) service that is implemented as

follows.

01 [ServiceContract]

02 [ServiceBehavior(IncludeExceptionDetailsInFaults = true)]

03 public class OrderService

04 {

05 [OperationContract]

06 public void SubmitOrder(Order anOrder)

07 {

08 try

09 {

10 …

11 }

12 catch(DivideByZeroException ex)

13 {

14 …

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. Replace line 14 with the following line: throw;

B. Replace line 14 with the following line:

throw new FaultException<Order>(anOrder, ex.ToString());

C. After line 05, add the following line:

[FaultContract(typeof(FaultException<Order>))]

Replace line 14 with the following line:

throw ex;

D. Alter line 05, add the following line:

[FaultContract(typeof(FaultException<Order>))]

Replace line 14 with the following line:

throw new FaultException<Order>(anOrder, “Divide by zero exception”);

Correct Answer: D

A WCF service code is implemented as follows. (Line numbers are included for reference only.)

01 [ServiceContract]

02 [ServiceBehavior(InstanceContextMode =

03 InstanceConcextMode.Single)]

04 public class CalculatorService

05 {

06 [OperacionContract]

07 public double Calculate(double opl, string op, double op2)

08 {

…

24 }

25 }

You need to decrease the response time of the service.

What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two

A. Change the service behavior to the following: [ServiceBehavior( InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple) ] B. Change the service behavior to the following: [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall) ] C. Require the clients use threads, the Parallel Task Library, or other mechanism to issue service calls in parallel. D. Require the clients to use async operations when calling the service.

Correct Answer: AB

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

01 [ServiceContract]

02 public interface IDataAccessService

03 {

04 [OperationContract]

05 void PutMessage(string message);

06

07 [OperationContract]

08 [FaultContract(typeof(TimeoutFaultException)) ]

09 [FaultContract(typeof(FaultException) ) ]

10 stringf] SearchMessages(string search);

11 }

The implementation of the SearchMessages method throws TimeoutFaultException exceptions for database timeouts. The implementation of the SearchMessages method also throws an Exception for any other issue it encounters while processing the request. These exceptions are received on the client side as generic FaultException exceptions.

You need to implement the error handling code for SearchMessages and create a new channel on the client only if the channel faults. What should you do? A. Catch and handle both TimeoutFaultException and FaultException B. Catch both TimeoutFaultException and FaultException. Create a new channel in both cases. C. Catch and handle TimeoutFaultException.Catch FaultException and create a new channel. D. Catch and handle FaultException.Catch TimeoutFaultException and create a new channel.

Correct Answer: C

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

You are debugging a Windows Communication Foundation (WCF) service. The service uses signed and encrypted messages. You need to configure logging so that you can read the contents of the messages. What should you do?

A. Set maxSizeMessagesToLog to 10

B. Set logMessageAtServiceLevel to true.

C. Set maxMessagesToLog to 10.

D. Set logMessageAtTransportLevel to true.

Correct Answer: B