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

1. 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 { ... [DataMemberl 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) Implement the CreditCardNumber property getter and setter. In the setter, run the value of the CreditCardNumber through the MD5CryptoServiceProvider class TransformBlock method
B) Add a DataProtectionPermission attribute to the CreditCardNumber property and set the ProtectData property to true.
C) Convert the DataContract to a MessageContract and set the ProtectionLevel property to SignAndEncrypt
D) Change the data type of CreditCardNumber from string to SecureString

2. You create a service and deploy it on a network in a building named Building1. You will deploy the service to Building2.
The service in Building1 is configured using the following discovery scopes.
<scopes>
<add
scope="http://contoso.com/Chicago/Building1"/>
<add
scope="ldap:///ou=Building1,ou=Chicago,o=contoso,c=us"/>
</scopes>
The service in Building2 will be configured using the following discovery scopes.
<scopes>
<add
scope="http://contoso.com/Chicago/Building2"/>
<add
scope="ldap:///ou=Building2,ou=Chicago,o=contoso,c=us"/>
</scopes>
You need to ensure that the client application can discover the service in Building1 or the service in Building2.
Which scopes should you add to the client configuration file?

A) <scopes>
<add
scope="ldap:///ou=Building,ou=Chicago,o=contoso,c=us"/>
</scopes>
B) <scopes>
<add
scope="ldap:///ou=*,o=contoso,c=us"/> </scopes>
C) <scopes>
<add scope="http://contoso.com/Chicago"/>
</scopes>
D) <scopes>
<add scope="http://contoso.com/Chicago/*"/>
</scopes>

3. You are creating a Windows Communication Foundation (WCF) service that accepts messages from clients when they are started. The message is
defined as follows. <MessageContract()> Public Class Agent Public Property CodeName As String Public Property SecretHandshake As String End Class You have the following requirements:
The CodeName property must be sent in clear text. The service must be able to verify that the property value was not changed after being sent by the client.
The SecretHandshake property must not be sent in clear text and must be readable by the service.
What should you do?

A) Add an ImmutableObject attribute to the CodeName property and set its value property to True. Add a Browsable attribute to the SecretHandshake property and set its value to False.
B) Add a MessageBodyMember attribute to the CodeName property and set the ProtectionLevel to Sign. Add a MessageBodyMember attribute to the SecretHandshake property and set the ProtectionLevel to EncryptAndSign.
C) Add an XmlText attribute to the CodeName property and set the DataType property to Signed. Add a PasswordPropertyText attribute to the SecretHandshake property and set its value to True.
D) Add a DataProtectionPermission attribute to the each property and set the ProtectData property to True.

4. A Windows Communication Foundation (WCF) service is required to log all authorization attempts to the Windows Event Log.
You need to configure a behavior and apply it to the service to support this requirement.
Which behavior should you configure and apply?

A) serviceCredentials
B) serviceAuthenticationManager
C) serviceAuthorization
D) serviceSecurityAudit

5. A self-hosted Windows Communication Foundation (WCF) service uses a secure HTTP
binding with a custom principal permission mode. The binding requires users to provide their Windows logon credentials.
You need to retrieve the identity of the caller.
What are two possible properties you can use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A) HttpContext.Current.User.Identity.Name
B) ServiceSecurity Context.Current.Primary Identity.Name
C) OperationContext.Current.ServiceSecurity Context.Primary Identity.Name
D) Thread.CurrentPrincipal.Identity-Name

Solutions: