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

1. You are debugging a Windows Communication Foundation (WCF) service.
The service uses signed and encrypted messages.
You need to configure logging so that you can read the contents of the messages.
What should you do?

A) Set maxSizeMessagesToLog to 10
B) Set logMessageAtTransportLevel to true.
C) Set maxMessagesToLog to 10.
D) Set logMessageAtServiceLevel to true.

2. You develop a Windows Communication Foundation (WCF) service that employees use to access bonus information. You define the following service contract. (Line numbers are included for reference only.)
01 [ServiceContract(SessionMode = SessionMode.Required)]
02 public interface IFinancialService
03 {
04 [OperationContract]
05 string Login(int employeeID, string passwordHash);
06
07 [OperationContract]
08 double GetBonus(int month);
09
10 [OperationContract(IsTerminating = true)]
11 void Logout();
12 }
Client applications can invoke methods without logging in.
You need to ensure that the client applications invoke Login before invoking any other method.
You also need to ensure that client applications cannot consume the service after invoking Logout.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Replace line 07 with the following code. [OperationContract(IsInitiating = false)]
B) Replace line 04 with the following code. [OperationContract(IsInitiating = false)]
C) Replace line 04 with the following code. [OperationContract(IsInitiating = true, IsTerminating = true)]
D) Replace line 10 with the following code. [OperationContract(IsInitiating = false, IsTerminating = true)]

3. You are configuring services to be discoverable. The services must be discoverable without relying on a central server. Client applications that consume the services are on a network segment that is separate from the network segment that the services are located on.
A firewall blocks all TCP ports between the two network segments, but allows other protocols to pass through.
You need to ensure that the client applications can discover the services.
What should you do?

A) Use ad-hoc discovery mode over UDP.
B) Use managed discovery mode over HTTP.
C) Use managed discovery mode over UDP.
D) Use ad-hoc discovery mode over HTTP.

4. You develop a Windows Communication Foundation (WCF) service that employees use to access bonus information. You define the following service contract. (Line numbers are included for reference only.)
01 <ServiceContract(SessionMode:=SessionMode.Required)> 02 Public Interface IFinancialService 03 04 <OperationContract()> 05 Function Login( ByVal employeeID As Integer, ByVal passwordHash As String) As String 06 07 <OperationContract()> 08 Function GetBonus(ByVal month As Integer) As Double 09 10 <OperationContract (IsTerminating:=True)> 11 Sub Logout() 12 13 End Interface
Client applications can invoke methods without logging in.
You need to ensure that the client applications invoke Login before invoking any other method.
You also need to ensure that client applications cannot consume the service after invoking Logout.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Replace line 04 with the following code. <OperationContract(IsInitiating:=False)>
B) Replace line 10 with the following code. <OperationContract(IsInitiating:=False, IsTerminating:=True)>
C) Replace line 04 with the following code. <OperationContract(IsInitiating:=True, IsTerminating:=True)>
D) Replace line 07 with the following code. <OperationContract(IsInitiating:=False)>

5. You develop a Windows Communication Foundation (WCF) service that contains the following code segment. (Line numbers are included for reference only.)

You need to ensure that all service endpoints are available to client applications. Which code segment should you insert at line 04?

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

Solutions: