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

1. You are modifying an existing Windows Communication Foundation (WCF) service that is defined as follows.

SubmitOrder makes a call to another service. The ProcessMessage method does not perform as expected under a heavy load.
You need to enable processing of multiple messages. New messages must only be processed when the ProcessMessage method is not processing requests, or when it is waiting for calls to SubmitOrder to return.
Which attribute should you apply to the MessageProcessor class?

A) CallbackBehavior ( ConcurrencyMode = ConcurrencyMode.Reentrant )
B) ServiceBehavior ( ConcurrencyMode = ConcurrencyMode.Reentrant )
C) ServiceBehavior ( ConcurrencyMode = ConcurrencyMode.Multiple )
D) CallbackBehavior ( ConcurrencyMode = ConcurrencyMode.Multiple )

2. You are modifying a Windows Communication Foundation (WCF) service that allows customers to update financial data. The service currently requires a transaction from the client application and is working correctly. The service contract is defined as follows. (Line numbers are included for reference only.)

The service must be modified so that client applications do not need to initiate a transaction when calling the operation. The service must use the client application's transaction if one is available. Otherwise it must use its own transaction.
You need to ensure that the service operation is always executed within a transaction.
What should you do?

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

3. You are adding a Windows Communication Foundation (WCF) service to an existing application. The application is configured as follows. (Line numbers are included for reference only.)
01 <configuration>
02 <system.serviceModel>
03 <services>
04 <service name="Contoso.Sales.StockService"
behaviorConfiguration="MetadataBehavior">
06 <host>
07 <baseAddresses>
08 <add
baseAddress="http://contoso.com:8080/StockService" />
09 </baseAddresses>
10 </host>
11 </service>
12 </services>
13 <behaviors>
14 <serviceBehaviors>
15 <behavior name="MetadataBehavior">
16 </behavior>
17 </serviceBehaviors>
18 </behaviors>
You need to configure the service to publish the service metadata.
Which two actions should you perform?
(Each correct answer presents part of the solution. Choose two.)

A) Add the following XML segment between lines 10 and 11.
<endpoint address=""
binding="basicHttpBinding"
contract="IMetadataExchange" />
B) Add the following XML segment between lines 10 and 11.
<endpoint address=""
binding="mexHttpBinding"
contract="IMetadataExchange" />
C) Add the following XML segment between lines15 and 16.
<serviceDiscovery>
<announcementEndpoints>
<endpoint address=""/>
</announcementEndpoints>
</serviceDiscovery>
D) Add the following XML segment between lines 15 and 16
<serviceMetadata httpGetEnabled="true"/>

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

ServiceB must not accept reentrant service calls. You need to modify the behavior of the service. What should you do?

A) Replace the code segment at line 01 with the following code segment: <ServiceBehavior (InstanceContextMode:=InstanceContextMode.Single) >
B) Insert the following code segment at line 07: <ServiceBehavior(ConcurrencyMode:=ConcurrencyMode.Multiple)>
C) Insert the following code segment at line 07: <ServiceBehavior(ReleaseServiceOnTransactionTransactionComplete:=True)>
D) Insert the following code segment at line 07: <ServiceBehavior(ReleaseServiceInstanceOnTransactionComplete:=False)>

5. You are creating a client application and configuring it to call a Windows Communication Foundation (WCF) service. When the application is deployed, it will be configured to send all messages to a WCF routing service.
You need to ensure that the application can consume the target service after the application is deployed.
What should you do?

A) In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the router service.
B) In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the target service.
C) In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the router service.
D) In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the target service.

Solutions: