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

1. 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 04 with the following code. <OperationContract(IsInitiating:=True, IsTerminating:=True)>
C) Replace line 10 with the following code. <OperationContract(IsInitiating:=False, IsTerminating:=True)>
D) Replace line 07 with the following code. <OperationContract(IsInitiating:=False)>

2. Four Windows Communication Foundation (WCF) services are hosted in Microsoft Internet Information Services (IIS). No behavior configuration exists in the web.config file.
You need to configure the application so that every service and endpoint limits the number of concurrent calls to 50 and the number of concurrent sessions to 25.
Which XML segment should you add to the system.serviceModel configuration section of the web.config file?

A) <behaviors>
<serviceBehaviors>
<behavior name="*">
<serviceThrottling maxConcurrentCalls="50" maxConcurrentSessions="25"/>
</behavior>
</serviceBehaviors>
</behaviors>
B) <behaviors>
<serviceBehaviors>
<behavior name="ALL">
<serviceThrottling maxConcurrentCalls="50" maxConcurrentSessions="25"/>
</behavior>
</serviceBehaviors>
</behaviors>
C) <behaviors>
<serviceBehaviors>
<behavior name="default">
<serviceThrottling maxConcurrentCalls="50" maxConcurrentSessions="25"/>
</behavior>
</serviceBehaviors>
</behaviors>
D) <behaviors>
<serviceBehaviors>
<behavior name="">
<serviceThrottling maxConcurrentCalls="50" maxConcurrentSessions="25"/>
</behavior> </serviceBehaviors> </behaviors>

3. 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.

The service in Building2 will be configured using the following discovery 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="http://contoso.com/Chicago"/>
</scopes>
B) <scopes>
<add scope="http://contoso.com/Chicago/*"/>
</scopes>
C) <scopes>
<add
scope="ldap:///ou=*,o=contoso,c=us"/>
</scopes>
D) <scopes>
<add
scope="ldap:///ou=Building,ou=Chicago,o=contoso,c=us"/>
</scopes>

4. A Windows Communication Foundation (WCF) service implements the following contract. (Line numbers are included for reference only.)
01 <ServiceContract()>
02 Public Interface IDataAccessService
03
04 <OperationContract()>
05 Sub PutMessage(ByVal message As String)
06
07 <OperationContract()>
08 <FaultContract(GetType(TimeoutFaultException))>
09 <FaultContract(GetType(FaultException))>
10 Function SearchMessages(ByVal search As String) As String ()
11
12 End Interface
The implementation of the SearchMessages method throws TimeoutFaultException exceptions for database timeouts. The implementation of the SearchMessages method also throws an Exception for any other issue it encounters while processing the request. These exceptions are received on the client side as generic FaultException exceptions.
You need to implement the error handling code for SearchMessages and create a new channel on the client only if the channel faults.
What should you do?

A) Catch and handle TimeoutFaultException. Catch FaultException and create a new channel.
B) Catch both TimeoutFaultException and FaultException. Create a new channel in both cases.
C) Catch and handle both TimeoutFaultException and FaultException.
D) Catch and handle FaultException. Catch TimeoutFaultException and create a new channel.

5. You have an existing Windows Communication Foundation (WCF) service that exposes a service contract over HTTP using explicit binding configuration.
You need to expose that contract over HTTP and TCP.
What should you do?

A) Add a net.tcp base address to the host.
B) Add an endpoint behavior named netTcpBehavior to the existing endpoint.
C) Add a binding configuration to the existing endpoint named netTcpBinding.
D) Add an endpoint configured with a netTcpBinding.

Solutions: