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Microsoft TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation Sample Questions:

1. You are creating a remote database management application by using Microsoft Windows Forms and Microsoft .NET Framework 3.5. You use the Windows
Communication Foundation model to create the application. You write the following code segment. (Line numbers are included for reference only.)
01 public class QueryAnalyzerService :
02 IQueryAnalyzerService, IDisposable {
04 public void Open() {
05}
06 public void ExecuteSql(string sql) {
07...
08!
09 public void Close() {
10...
11}
12 public void Disposed
13...
14}
15...
16}
You need to ensure that each time a client application calls the Open0 method, a new service instance is created. Which code segment should you insert at line 03?

A) [OperationBehavior( TransactionScopeRequired=true)]
B) [OperationBehavior( AutoDisposeParameters=true)]
C) [OperationBehavior( ReleaselnstanceMode=ReleaselnstanceMode.BeforeCall))
D) [OperationBehavior( ReleaselnstanceMode=ReleaselnstanceMode.None)]

2. You create a stateless, thread-safe service by using Microsoft .NET Framework 3.5. You use the Windows Communication Foundation model to create the service. Load testing reveals that the service does not scale above 1,000 concurrent users.
You discover that each call to the service instantiates a new service instance. You also discover that these service instances are expensive to create. You need to ensure that 5,000 concurrent users can access the service.
Which code segment should you use?

A) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Multiple)]
B) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode. Single, ConcurrencyMode=ConcurrencyMode.Reentrant)]
C) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode.PerCall ConcurrencyMode=ConcurrencyMode.Multiple)]
D) [ServiceBehavior( lnstanceContextMode=lnstanceContextMode.PerCall ConcurrencyMode=ConcurrencyMode.Reentrant)]

3. You create a client application by using Microsoft .NET Framework 3.5. The client application uses a Windows Communication Foundation (WCF) service.
The WCF service analyzes incoming message headers to verify whether special processing of the message is required.
The client application accompanies each call to the methods of the service with the address header.
You write the following code segment. (Line numbers are included for reference only.)

You need to ensure that the following requirements are met:
The client application makes a second call to the FindPhoneByAddress method.
The message header of the second call is presented by a variable named newHeader.
Which code segment should you insert at line 11?

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

4. You create a Windows Communication Foundation client application by using Microsoft .NET Framework 3.5. The client application communicates with an existing Web service that requires custom HTTP headers. You need to ensure that all messages sent to the service include the headers. Which two tasks should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Create a custom endpoint behavior. Add the message inspector by using the IEndpointBehavior.ApplyClientBehavior method.
B) Create a message inspector. Insert the custom headers by using the ICIientMessagelnspector.AfterReceiveReply method.
C) Create a message inspector. Insert the custom headers by using the ICIientMessagelnspector.BeforeSendRequest method.
D) Create a custom endpoint behavior. Add the message inspector by using the IEndpointBehavior.AddBindingParameters method.

5. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service contains the following binding configuration in the configuration file. (Line numbers are included for reference only.)
01 <wsHttpBinding>
02 <binding name="ssl">
04 </binding> 05 </wsHttpBinding>
You need to ensure that the following requirements are met:
Which configuration setting should you insert at line 03?

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

Solutions: