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

1. You have a Windows Communication Foundation (WCF) service that uses multiple endpoints. The configuration file for the service contains the following XML markup:
<source name="System.ServiceModer switchValue= "Verbose, ActivityTracing">
One of the service endpoints throws an exception.
You need to correlate every call to the service to identify the source of the exception.
In the configuration file for the service, what should you do?

A) Change value of the switchValue attribute to Error.
B) In the diagnostic section, set the value of the propagateActivity attribute to true.
C) In the diagnostic section, set the value of the propagateActivity attribute to false.
D) Change the value of the switchValue attribute to Critical.

2. You are developing a Windows Service. The Windows Service will host a Windows Communication Foundation (WCF) service.
The Windows Service class will inherit from ServiceBase.
You need to ensure that the WCF service starts when the Windows Service is restarted.
What should you do in the Windows Service class?

A) Create a public method named Main.
Create a new ServiceHost in the Main method.
Override the OnShutdown method and close the ServiceHost.
B) Override the OnContinue method and open a new ServiceHost.
Override the OnStop method and close the ServiceHost.
C) Override the OnPowerEvent method and open a new ServiceHost.
Override the OnShutdown method and close the ServiceHost.
D) Override the OnStart method and create and open a new ServiceHost.
Override the OnStop method and close the ServiceHost.

3. A Windows Communication Foundation (WCF) application uses the following data contract.

You need to ensure that the following XML segment is generated when the data contract is serialized.

Which code segment should you use?

A) <DataMember(EmitDefaultValue:=False)>
Public firstName As String = Nothing
<DataMember(EmitDefaultValue:=False)>
Public lastName As String = Nothing
<DataMember(EmitDefaultValue:=True)>
Public age As Integer = -1
<DataMember(EmitDefaultValue:=False)>
Public ID As Integer = 999999999
B) <DataMember()>
Public firstName As String
<DataMember()>
Public lastName As String
<DataMember(EmitDefaultValue:=True)>
Public age As Integer = 0 <DataMember(EmitDefaultValue:=True)> Public ID As Integer = 999999999
C) <DataMember()>
Public firstName As String = Nothing
<DataMember()>
Public lastName As String = Nothing
<DataMember(EmitDefaultValue:=False)>
Public age As Integer = 0
< DataMember(EmitDefaultValue:=False)>
Public ID As Integer = 999999999
D) <DataMember(EmitDefaultValue:=True)>
Public firstName As String
<DataMember(EmitDefaultValue:=True)>
Public lastName As String
<DataMember
(EmitDefaultValue:=False)>
Public age As Integer = -1
<DataMember(EmitDefaultValue:=False)>
Public ID As Integer = 999999999

4. You are developing a Windows Communication Foundation (WCF) service. You establish that the largest size of valid messages is 8,000 bytes. You notice that many malformed messages are being transmitted.
Detailed information about whether each message is malformed must be logged.
You need to ensure that this information is saved in XML format so that it can be easily analyzed.
What should you add to the service configuration file?

A) <message Logging logEntireMessage="true" logHalformedMessages""false" logMessagesAtServiceLevel-"true" logMessagesAtTransportLevel-"true" maxMessagesToLog="1000" maxSizeOfMessageToLog="8000"/>
B) <messageLogging logEnt ireMessage="true" logHalformedMessages="true" logMessagesAtServiceLevel="true" logMessagesAtTranspoctLevel="true" maxMessagesToLog="1000" maxSizeOfMessageToLog="100000"/>
C) <roessageLogging logEntireMessage="true" logNalformedMessages="false" logMessagesAtServiceLeve1="true" logMessagesAtTransportLevel="true" maxMessagesToLog""1000"/>
D) <messageLogging logMessagesAtServiceLevel="true" logMessagesAtTransportLevels"true" maxMessagesToLog="1000" maxSizeOfMessageToLog="8000"/>

5. You have an existing Windows Communication Foundation (WCF) Web service. The Web service is not responding to messages larger than 64 KB.
You need to ensure that the Web service can accept messages larger than 64 KB without generating errors.
What should you do?

A) Increase the value of maxReceivedMessageSize on the endpoint binding.
B) Increase the value of maxBufferSize on the endpoint binding.
C) Increase the value of maxRequestLength on the httpRuntime element.
D) Increase the value of maxBufferPoolSize on the endpoint binding.

Solutions: