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시험 번호/코드: 070-521
시험 이름: Microsoft (Upgrade: Transition Your MCPD Windows Developer 3.5, or Enterprise Application Developer 3.5, Skills to MCPD Windows Developer 4)
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Q&A: 115 문항
업데이트: 2014-05-03
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NO.1 Your Windows Communication Foundation (WCF) client application uses HTTP to communicate
withthe 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 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);
B.In the application configuration file, add the following XML segment to the system.serviceModel
configuration section group.
<diagnostics>
<messageLogging logMessagesAtTransportLevel="true"
logEntireMessage="true" />
</diagnostics>
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 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>
Answer: D
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NO.2 A Windows Communication Foundation (WCF) application uses a data contract that has several data
members.
You need the application to throw a SerializationException if any of the data members are not present
when a serialized instance of the data contract is deserialized.
What should you do?
A.Add the KnownType attribute to the data contract. Set a default value in each of the data member
declarations.
B.Add the KnownType attribute to the data contract. Set the Order property of each data member to
unique integer value.
C.Set the EmitDefaultValue property of each data member to false.
D.Set the IsRequired property of each data member to true.
Answer: D
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NO.3 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 InstanceContextMode
property set to Single.
B.In the message security configuration, change clientCredentialType from IssuedToken to UserName.
C.In the message security configuration, set establishSecurityContext to false.
D.At the end of every operation, call the SessionStateUtility.RaiseSessionEnd method.
Answer: C
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NO.4 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
{
...
[DataMember]
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.Add a DataProtectionPermission attribute to the CreditCardNumber property and set the ProtectData
property to true.
B.Convert the DataContract to a MessageContract and set the ProtectionLevel property to
EncryptAndSign.
C.Change the data type of CreditCardNumber from string to SecureString.
D.Implement the CreditCardNumber property getter and setter. In the setter, run the value of the
CreditCardNumber through the MD5CryptoServiceProvider class TransformBlock method.
Answer: B
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NO.5 You are moving a Windows Communication Foundation (WCF) service into production.
You need to be able to monitor the health of the service. You only want to enable all performance counter
instances exposed by the ServiceModelService 4.0.0.0 counter group.
Which element should you add to the system.serviceModel section in the application configuration file?
A.<diagnostics performanceCounters="ServiceOnly" />
B.<diagnostics wmiProviderEnabled="true" performanceCounters="Off" />
C.<diagnostics performanceCounters="All" />
D.<diagnostics wmiProviderEnabled="true" />
Answer: A
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NO.6 A WCF service code is implemented as follows. (Line numbers are included for reference only.)
01 [ServiceContract]
02 [ServiceBehavior(InstanceContextMode =
03 InstanceContextMode.Single)]
04 public class CalculatorService
05 {
06 [OperationContract]
07 public double Calculate(double op1, 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.
Answer: AB
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NO.7 You are building a client for a Windows Communication Foundation (WCF) service.
You need to create a proxy to consume this service.
Which class should you use?
A.ChannelFactory<TChannel>
B.ServiceHost
C.ClientRuntime
D.CommunicationObject
Answer: A
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NO.8 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(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 {
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.After 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");
Answer: D
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