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

1. You are developing a Windows Communication Foundation (WCF) service to provide shopping cart support. ASP.NET compatibility mode is not enabled.
The shopping cart information must be retained across user visits to the store until the user explicitly empties the cart or submits the cart contents to order.
You need to implement the service as a DurableService.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Create the persistence provider database and configure the persistenceProvider element of the service behavior to point to that database.
B) Use basicHttpBinding for both the client application and the service.
C) In the method to add an item to the shopping cart, serialize the shopping cart contents after adding the current item and storing it in a Session variable.
D) Use wsHttpContextBinding for both the client application and the service.

2. A Windows Communication Foundation (WCF) service only accepts messages that are signed and encrypted a client application is not receiving expected responses from the service.
You need to enable logging to verity that the messages from the client are signed and encrypted.
You also need to see what each message looks like before the message body is deserialized into a
NET object what should you do?

A) Configure the System. Service Model Message Logging trace source in the system.
diagnostics configuration section.
In the system service Model configuration, add the following xML segment
<diagnostics>
<message Logging Iog Messages At Service Levele true"
log Messages At Transport Levele"true" 1>
</diagnostics>
B) Configure the System. Service Model Message Logging trace source in the system
diagnostics
configuration sectionIn the system. service Model configuration, add the following XML
segment.
<diagnostics>
<message Logging log Entire Message='
true Iog Messages At Service LeveI true"
log Messages At Transport Level=true" I> <Idiagnostics>
C) Configure the System. Service Model trace source in the system diagnostics
configuration section.
In the system.serviceModel configuration, add the following XML segment,
<diagnostics>
<message Logging log Entire Message="
true log Messages t Service LeveI-true' Is
<diagnostics>
D) Configure the System Service Model trace source in the system diagnostics
configuration section.
In the system service Model configuration add the following xML segment
<diagnostics>
<message Logging log Entire Messages" true
logMessagesAtServiceLeveIetrue"
logMessagesAtTransportLeveletrue" />
</diagnostics>

3. A Windows Communication Foundation (WCF) solution exposes the following service over a TCP binding. (Line numbers are included for reference only.)
01 [ServiceContract]
02 [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]
03 public class DataAccessService
04 {
05 [OperationContract]
06 public void PutMessage(string message)
07 {
08 MessageDatabase.PutMessage(message);
09 }
10 [OperationContract]
11 public string[] SearchMessages(string search)
12 {
13 return MessageDatabase.SearchMessages(search);
14 }
15 }
MessageDatabase supports a limited number of concurrent executions of its methods.
You need to change the service to allow up to the maximum number of executions of the methods of MessageDatabase. This should be implemented without preventing customers from connecting to the service.
What should you do?

A) Add a throttling behavior to the service, and configure the maxConcurrentCalls.
B) Change the service behavior as follows. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Single, InstanceContextMode = InstanceContextMode.PerSession)]
C) Change the service behavior as follows. [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple, InstanceContextMode = InstanceContextMode.Single)]
D) Add a throttling behavior to the service, and configure the maxConcurrentSessions.

4. You have a Windows Communication Foundation (WCF) service that accepts the following message contract.

You need to ensure that the client sends a SOAP body that is accepted by the service.

A) <Ticket xmlns="http://www. movietheatec.com">
<ShowTime
xmlns-"http://www.movietheater.com">
2010-07-05TOO:51:10.0999304-05:00
</ShowTime>
<NumberOfSeats
xmlns="http://wwv.movietheatec.com"> 0
</NumberOfSeats>
<ReservationName
xmlns="http://www.movletheatec.com" />
</Ticket>
B) <Ticket xmlns="http://www.movies. com">
<NumberOfSeats
xmlns="http : //www.movietheater . com">
0
</NumberOfSeats>
<ReservationName xmlns="http://www.movietheater .com" />
<ShowTime
xmlns="http://www.movietheater.com">
2010-07-05T00:SI:10.0999304-05:00
</ShowTime>
</Ticket>
C) <Ticket xmlns="http://www.movietheater.com">
<ShowTime
xmlns="http : //www.movietheater . com">
2010-07-05T00:51:10.0999304-05:00
</ShowTime>
<ReservationName xmlns="http://www.movietheater.com" />
<NumberOfSeats
xmlns="http://www.movietheater.com">
0
</NumberOfSeats>
</Ticket>
D) <Ticket xmlns="http://wwv.movies.com">
<ShowTime
xmlns-"http://www.movietheatec.com">
2010-07-05TOO:51:10.0999304-05:00
</ShowTime>
<Number Of Seats
xmlns="http://www.movietheater.com"> 0
</NumbecOfSeats>
<ReservationName xmlns""http://www.movietheotec.com" />
</Ticket>

5. You develop a Windows Communication Foundation (WCF) SOAP service that contains a class named Order. The Order class includes a field named secret that stores private data.
The Order class includes the following code:

The service has the following requirements:
- The secret field must be encrypted.
- All other fields in the Order class must serialize as plain text. You need to configure serialization for the Order class.
What should you do?

A) Add a MessageBodyMember attribute to the secret field and set the ProtectionLevel to
EncryptAndSign.
Add a MessageBodyMember attribute to each of the other fields of the class.
B) Add a MessageHeader attribute to the secret field and set the ProtectionLevel to Sign.
Add a MessageBodyMember attribute to each of the other fields of the class.
C) Add a MessageHeader attribute to the secret field and set the ProtectionLevel to
EncryptAndSign.
Add a MessageBodyMember attribute to each of the other fields of the class.
D) Add a MessageBodyMember attribute to the secret field and set the ProtectionLevel to
Sign.
Add a MessageBodyMember attribute to each of the other fields of the class.

Solutions: