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Microsoft TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation Sample Questions:

1. You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5.
The service will authenticate the client applications by using Personal Information Cards.
You write the following code segment. (Line numbers are included for reference only.)
01 public class CustomServiceAuthorizationManager:
02 ServiceAuthorizationManager{
03 protected override bool CheckAccessCore(OperationContext operationContext)
04 {
05 string action = operationContext.RequestContext.RequestMessage.Headers.Action;
06 if (action == "http://tempuri.org/lEnginefUpdate")
07 {
06 foreach (ClaimSet cs in
operationContext.ServiceSecurityContext.AuthorizationContext.ClaimSets)
09 {
10
11
12 return false;
13 }
14 return true;
15 }
16 } ...
17 bool IsEmailValid(string email)
18 {
19 //e-mail validation is performed here;
20 return true;
21 }
You need to ensure that only those client applications that provide a valid email address can execute the Update method.
Which code segment should you insert at line 10?

A) foreach (Claim c in
cs.FindClaims("http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress",
String.Empty))
return IsEmailValid(c.Resource.ToString());
B) foreach (Claim c in
cs.FindClaims("http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress",
"PossessProperty"))
return IsEmailValid(c.Resource.ToString());
C) foreach (Claim c in
cs.FindClaims("http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress",
Rights.Identity))
return IsEmailValid(c.Resource.ToString());
D) foreach (Claim c in
cs.FindClaims("http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress",
Rights.PossessProperty))
return IsEmailValid(c.Resource.ToString());

2. You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You write the following code segment for the service implementation. (Line numbers are included for reference only.)
01 Public Sub PutMessage(ByVal msg As Message)
02 Dim value As String = Nothing
04 End Sub You need to retrieve the content from the received message body and store it in the variable named value.
Which code segment should you insert at line 03?

A) Option A
B) Option C
C) Option D
D) Option B

3. You want to upgrade a ASMX webservice to WCF, but you want to support legacy client applications.
<some code here>
What code do you use to transfer binary data from the server to the client?

A) BindingElement encoding = new TextMessageEncodingBindingElement(MessageVersion.Soap11.....)
B) BindingElement encoding = new TextMessageEncodingBindingElement (Soap12WSAddressingAugust2004..)
C) BindingElement encoding = new BindingElement()
D) BindingElement encoding = new MtomMessageEncodingBindingElement(.....)

4. You are creating a Windows Communication Foundation (WCF) client application by using Microsoft .NET Framework 3.5.
The WCF application is hosted in a Windows service. The service uses the LocalSystem account. The application uses Message Security with Windows credentials.
You need to ensure that the application does not negotiate the authentication protocol.
Which endpoint identity settings should you apply?

A) <identity>
<userPrincipalName value="LocalSystem"/>
</identity>
C .<identity>
<servicePrincipalName value="host/YourComputerName" />
</identity>
B) <identity>
<dns value="http: //YourComputerName"/>
</identity>
C) <identity>
<certificateReference findValue="Thumbprint of certificate is here"
storeLocation="LocalMachine"
x509FindType="FindByThumbprint"
storeName="TrustedPeople"/>
</identity>

5. You create an application by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5. You are designing a data contract for a Windows Communication foundation (WCF) service that will be hosted by the application. You need to ensure that the data contract meets the following requirements: It does not support Schema versioning.
It allows additional contract and additional elements to be included over time. It allows the client applications to submit messages that contain additional elements without error.
What should you do?

A) Implement the IMetadataExchange interface.
B) Use the IsRequired property.
C) Implement the IExtensibleDataObject interface.
D) Use the DataMemberAttribute attribute.

Solutions: