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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.)

You need to ensure that each time a client application calls the Open() method, a new service instance is created.
Which code segment should you insert at line 03?

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

2. You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You write the following code segment.

You need to ensure that when the MyMethod method is called, the service is the root of a transaction. Which code segment should you insert at line 09?

A) [OperationBehavior(TransactionScopeRequired=false)] [TransactionFlow(TransactionFlowOption.NotAllowed)]
B) [OperationBehavior(TransactionScopeRequired=true)] [TransactionFlow(TransactionFlowOption.Allowed)]
C) [OperationBehavior(TransactionScopeRequired=false)] [TransactionFlow(TransactionFlowOption.Mandatory)]
D) [OperationBehavior(TransactionScopeRequired=true)] [TransactionFlowfTransactionFlowOption.NotAllowed)]

3. You are creating a client application by using Microsoft .NET Framework 3.5. The application will be accessible on the Internet.
You plan to use the wsHttpBinding binding by using HTTPS. The Windows Communication Foundation (WCF) service is hosted by a Windows service. You associate the HTTPS port of the WCF server with an X.509 certificate.
You need to ensure that the client application trusts and validates the certificate.
What should you do?

A) Subscribe to the ServerCertificateValidationCallback event of the System.Net.ServicePointManager class.
Write the validation code in the boolValidate(object sender, X509Certificate cert, X509Chain chain. System.Net.Security.SslPolicyErrors error) event handler on the client side.
B) Derive a class from the System.IdentityModel.Selectors.X509CertificateValidator class.
Create an instance of the derived class on the server side.
Write the validation code in the public override void Validate(X509Certificate2 certificate) method.
C) Subscribe to the ServerCertificateValidationCallback event of the System.Net.ServicePointManager class.
Write the validation code in the boolValidate(object sender, X509Certificate cert, X509Chain chain. System.Net.Security .SslPolicyErrors error) event handler on the server side.
D) Derive a class from the System.IdentityModel.Selectors.X509CertificateValidator class.
Create an instance of the derived class on the client side.
Write the validation code in the public override void Validate(X509Certificate2 certificate) method.

4. 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 reads the value of the incoming message headers by using the following code segment.

The following code fragment is a part of the application configuration file. (Line numbers are included for reference only.)

The client application adds a message header each time it calls the WCF service.
You need to ensure that the message header provides the following values to its parameters.

Which code fragment should you insert at line 04?

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

5. You are creating a Windows Communication Foundation (WCF) client application by using Microsoft .NET Framework 3.5.
The application uses the XML data format to exchange data with the service.
You plan to change the data format to JavaScript Object Notation (JSON).
You need to ensure that the client application can access the JSON WCF service.
What should you do?

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

Solutions: