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

1. A class named TestService implements the following interface.

TestService is hosted in an ASP.NET applicator.
You need to modify the application to allow the GetServiceTime method to return the data formatted as JSON.
It must do this only when the request URL ends in lServiceTime.
What should you do?

A) Add this attribute to the GetServiceTime method
<webGet(
ResponseFormat WebMessageFormatJson,
UnTemplate:eJServiceTime")>?
Create a new svc file named Jsonversion svc with the following contract <%@ ServiceHost
Servicee"TessService"i
Factory="System ServiceModelktivation WebServiceHosFactory" %s
B) Add this attribute to the GetServiceTime method
<WebGet(UriTempbte: z"{Json}/ServiceTime")>
Create a new svc file named Jsonversionsvc with the following contert <%@ ServiceHost
Service="TestSenvice"
Factoryz'System Se viceMode[ktivationWebServiceHodFactory" %>
C) Add this attribute to the GetServiceTime method
<Webinvoke(Method PGETw,
UrTemplate:eiSeneiceTim&, ResponseFormat: WebMessageFormatJson)>
In the bconfIg file, configure TestService in the system.arviceModeI/services collection as
follows. <senvice
namee"TestService"> <endpoint ad&esse"ISer,iceTime"r
contracte"TestSence' bindingewebHttpBindngw />
c/service>
D) Add this attribute to the GetServiceTime method <webinvoke(Method "POST)> In the bconfig file, add this element to systemserviceModeI/behaviors/endpointBehaviors. <behavior names"Json">e <enableWebScript
c/behavior>
In the web.config file, configure TestService in the system.serviceModel/services collection
as follows.
<service name"TestService">s
<endpoint address/ServiceTime"
contract-"TestSerAce""
behaviorConlfgurationz'Json
bindinge"webHttpBinding"!> <!services

2. You have a Windows Communication Foundation (WCF) service.
The service has issues with performance when it receives messages on a specific endpoint. The service must collect the minimum number of performance counters to diagnose the message issues.
You need to configure the service.
In the web.config file for the service, what should you do?

A) In the service configuration diagnostics section, set the value of the performanceCounters property to ServiceOnly.
B) Enable message logging for the endpoint.
C) Enable the Windows Management Instrumentation (WMI) provider.
D) In the service configuration diagnostics section, set the value of the performancCounters property to All.

3. You are developing a Windows Communication Foundation (WCF) service that is hosted by a Windows Forms application.
The ServiceHost instance is created in the Form constructor.
You need to ensure that the service is not blocked while the UI thread is busy.
What should you do?

A) Call the BeginInvoke method of the form and supply a delegate.
B) Call the Invoke method of the form and supply a delegate.
C) Decorate the service implementation class with the following line of code.
<ServiceBehavior(
ConcurrencyMode:=ConcurrencyMode.Multiple)>
D) Decorate the service implementation class with the following line of code.
<ServiceBehavior(
UseSynchronizationContext:=False)>

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

5. You are developing a data contract for a Windows Communication Foundation (WCF) service.
The data in the data contract must participate in round trips. Strict schema validity is not required.
You need to ensure that the contract is forward-compatible and allows new data members to be added to it.
Which interface should you implement in the data contract class?

A) IExtensibleObject(Of T)
B) IExtension(Of T)
C) ICommunicationObject
D) IExtensibleDataObject

Solutions: