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| Section | Objectives |
|---|---|
| Topic 1: Security, Transactions and Reliability | - Reliable messaging and error handling - Transactions, concurrency and instance management - Configuring security (transport and message level) |
| Topic 2: Client Configuration and Communication | - Bindings and interoperability considerations - Creating and configuring WCF client applications - Channel factories and proxy generation |
| Topic 3: Windows Communication Foundation Fundamentals | - Understanding WCF architecture and programming model - Service contracts, data contracts, and message contracts - Bindings, endpoints, and host configuration |
| Topic 4: Service Implementation and Hosting | - Hosting WCF services in managed applications, IIS and WAS - Configuring service behavior and metadata exposure - Implementing service contracts in C# using .NET Framework 3.5 |
1. You are creating a Windows Communication Foundation application by using Microsoft .NET Framework 3.5.
You create a service that provides access to the intranet file server of your company. Users must be able to update and delete files from the server by using the service.
You write the following code segment.
You need to ensure that files can be updated or deleted only by users with the required privileges defined in the server's file system ACLs. What should you do?
A) Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperations="false" />
Decorate the Delete and Update methods of the IFileServer interface by using the following
attribute.
[OperationBehavior(Impersonation=ImpersonationOption.Required)]
B) Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperations="false" />
Decorate the Delete and Update methods of the FileServer class by using the following
attribute.
[OperationBehavior(Impersonation=ImpersonationOption.Required )]
C) Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperations="true" />
Decorate the Delete and Update methods of the IFileServer interface by using the following
attribute.
[OperationBehavior(Impersonation=ImpersonationOption.Alloraed)]
D) Define the service behavior in the following manner.
<serviceAuthorization impersonateCallerForAllOperations="true" />
2. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You create the following service definition.
<ServiceContractQ> _ Public Interface IMyService ... End Interface
You need to custom manage the lifetime of the session.
Which service implementation should you use?
A) <ServiceBehavior(UseSynchronizationContext:=False)> _
Public Class ServicelmpID
...
End Class
B) <ServiceBehavior(AutomaticSessionShutdown:=False)> _
Public Class Servicelmp1
...
End Class
C) <ServiceBehavior(AutomaticSessionShutdown:=True)> _
Public Class Servicelmp1
...
End Class
D) <ServiceBehavior(UseSynchronizationContext:=True)> _
Public Class Servicelmp1
...
End Class
3. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You write the following code fragment for the configuration setting. (Line numbers are included for reference only.)
01 <wsHttpBinding> 02 <binding name="simple">
04 </binding> 05 </wsHttpBinding>
You need to ensure that the service uses transport security and allows access to anonymous client applications. Which code fragment should you insert at line 03?
A) <security mode="Transport" > <message clientCredentialType="None"></security>
B) <security mode="Transport" > transport clientCredentialType="Basic" /></security>
C) <security mode="Transport" > <message clientCredentialType="Certificate"></security>
D) <security mode="Transport" > transport clientCredentialType="None" /></security>
4. You are creating an application by using Microsoft .NET Framework 3.5. You use Windows Communication Foundation (WCF) to create the application. The YourUserNamePasswordValidator class is implemented in the host application of the WCF service. The host application is named YourServiceHost.exe. You write the following code segment.
namespace YourSecureService
{
class YourUserNamePasswordValidator : UserNamePasswordValidator {
public override void Validate(string userName, string password)
{
...
}}
}
You need to perform custom validation of the user name and password by using the YourUserNamePasswordValidator class. What should you do?
A) Set the netTcpBinding binding in the following manner. <security mode="Transport">
<transport
clientCredentialType="UserName" /></security> Set the service behavior by using the
following credentials.
<userNameAuthentication customUserNamePasswordValidatorType="YourSecureService.
YourUserNamePasswordValid ator " userNamePasswordValidationMode="Custom"/>
B) Set the wsHttpBinding binding in the following manner. <security mode="Message">
<transport
clientCredentialType="UserName" /></security> Set the service behavior by using the
following credentials.
<userNameAuthentication
customUserNamePasswordValidatorType="YourUserNamePasswordValidator,
YourServiceHo st" userNamePasswordValidationMode="Custom"/>
C) Set the wsHttpBinding binding in the following manner. <security mode="Message">
<message
clientCredentialType="UserName" /></security> Set the service behavior by using the
following credentials.
<userNameAuthentication customUserNamePasswordValidatorType="YourSecureService.
YourUserNamePasswordValid a or,YourServiceHost"
userNamePasswordValidationMode="Custom"/>
D) Set the wsHttpBinding binding in the following manner. <security mode="Message">
<message
clientCredentialType="UserName" /></security> Set the service behavior by using
thefollowing credentials.
<userNameAuthentication
customUserNamePasswordValidatorType="YourSecureService.YourUserNamePasswordV
alid ator"
userNamePasswordValidationMode="Custom"/>
5. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You write the following code segment to create a service contract. (Line numbers are included for reference only.)
You need to ensure that the client applications always use a binding that supports sessions.
Which code segment should you insert at line 01?
A) <ServiceContract(ProtectionLevel:=ProtectionLevel.EncryptAndSign)> __
B) <ServiceContract(SessionMode:=SessionMode.Required)>
C) <ServiceContract(SessionMode:=SessionMode.Allowed)> __
D) <ServiceContract(ProtectionLevel:=ProtectionLevel._ EncryptAndSign,SessionMode:=SessionMode.Allowed)> __
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: C | Question # 5 Answer: B |
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