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

1. You create a stateless, thread-safe service by using Microsoft .NET Framework 3.5.
You use the Windows Communication Foundation model to create the service. Load testing reveals that the service does not scale above 1,000 concurrent users. You discover that each call to the service instantiates a new service instance. You also discover that these service instances are expensive to create. You need to ensure that 5,000 concurrent users can access the service.
Which code segment should you use?

A) <ServiceBehavior(_
lnstanceContextMode:=lnstanceContextMode.Single, _ConcurrencyMode:=ConcurrencyMode.Reentrant)> _
B) <ServiceBehavior(_ InstanceContextMode:=lnstanceContextMode.PerCall, _ConcurrencyMode:=ConcurrencyMode.Reentrant)> _
C) <ServiceBehavior(_ InstanceContextMode:=lnstanceContextMode.PerCall, _ConcurrencyMode:=ConcurrencyMode.Multiple)> _
D) <ServiceBehavior(_ lnstanceContextMode:=lnstanceContextMode.Single, _ConcurrencyMode:=ConcurrencyMode.Multiple)> _

2. You create a client application by using Microsoft .NET Framework 3.5. The client application consumes a Windows Communication Foundation service that uses the netMsmqBinding binding.
The binding uses a private transactional queue named 28 http://www.abc.com
Library. The following code fragment is part of the application configuration file. (Line numbers are included for reference only.)
01 <endpoint binding="netMsmqBinding" 02 contract="ServiceReference.lLibrary" 03 04 /> You need to specify the address of the endpoint.
Which attribute should you insert at line 03?

A) address="net.msmq://localhost/private/transactional/Library"
B) address="net.msmq://.\private$\Library"
C) address=".\private$\Library"
D) address="net.msmq://localhost/private/Library"

3. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You need to programmatically add the following endpoint 49 http://www.abc.com definition to the service.
http://localhost:8000/ExamService/service Which code segment should you use?

A) Dim baseAddress As String = _"http: //localhost:8000/ExamService/service"Dim bindingl
As New NetTcpBindingQUsing host As New ServiceHost(GetType(ExamService))
host.AddServiceEndpoint(GetType(IExam),
bindingl, baseAddress)End Using
B) Dim baseAddress As String = _ "http: //localhost:8000/ExamService/service"Dim bindingl As New BasicHttpBindingQUsing host As New ServiceHost(GetType(ExamService)) host.AddServiceEndpoint(GetType(IExam), bindingl, baseAddress)End Using
C) Dim baseAddress As String = "http: //localhost:8000/ExamService"Dim bindingl As New WSHttpBindingQUsing host As New ServiceHost(GetType (ExamService)) host.AddServiceEndpoint(GetType(IExam), bindingl, baseAddress)End Using
D) Dim baseAddress As String = "http: //localhost:8000/ExamService"Dim bindingl As New BasicHttpBindingQUsing host As New ServiceHost(GetType (ExamService)) host.AddServiceEndpoint(GetType(IExam), bindingl, baseAddress)End Using

4. You create a Windows Communication Foundation (WCF) service by using Microsoft .NET framework 3.5. You write the following code segment for a service contract.

You need to ensure that the WCF service meets the following requirements:
Which method implementation should you use?

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

5. You are creating a Windows Communication Foundation client application by using Microsoft .NET Framework 3.5.
You add the following code segment to a service contract.
[ServiceContract]
interface IDocumentService
{
[OperationContract]
int DeleteDocument(int id);
}
The DeleteDocument method in the service contract takes a long time to execute.
The client application stops responding until the method finishes execution.
You write the following code segment to create an instance of a service proxy in the client application.
(Line numbers are included for reference only.)
01 static void Main() 02 {
03 DocumentServiceClient client= new DocumentServiceClient();
05 }
06 static void ProcessDeleteDocument(IAsyncResult result)
07 {
06 ...
09 }
You need to ensure that the service methods are called asynchronously.
What should you do?

A) Insert the following code segment at line 04:
client.BeginDeleteDocument(20, ProcessDeleteDocument, client);
Insert the following code segment at line 06:
int count=(result.AsyncState as Documentserviceclient).EndDeleteDocument(null);
B) Insert the following code segment at line 04:
client.BeginDeleteDocument(20, ProcessDeleteDocument, client);
Insert the following code segment at line 06:
int count=(result.AsyncState as Documentserviceclient).EndDeleteDocument(result);
C) Insert the following code segment at line 04:
client.BeginDeleteDocument(20, ProcessDeleteDocument, client);
Insert the following code segment at line 06:
result.AsyncWaitHandle.WaitOne();
int count=(result as Documentserviceclient).EndDeleteDocument(result)
D) Insert the following code segment at line 04:
IAsyncresult result = client.BeginDeleteDocument(20, ProcessDeleteDocument, client);
int count=client.EndDeleteDocument(result);
Insert the following code segment at line 06:
result.AsyncWaitHandle.WaitOne();

Solutions: