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

1. You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service contains the following code segment.

You need to ensure that the service instance is recycled when the transaction is complete. Which line of code should you insert at line 06?

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

2. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. The service will be hosted on a Web server. You add the following code fragment to the .svc file. <% @ServiceHost Factory="ExamServiceFactory" Service="ExamService" %>
You need to create the 3 instances of the services by using the custom ExamServiceFactory class.
Which code segment should you use?

A) public class ExamServiceFactory : ServiceHostFactoryj protected override ServiceHost
CreateServiceHost(Type serviceType, Uri[] baseAddresses) {//Implementation code
comes here.}
B) public class ExamServiceFactory : ServiceHostBasej protected override void
ApplyConfigurationQ {//Implementation code comes here. }}
C) public class ExamServiceFactory : ServiceHostj protected override void
ApplyConfigurationO {
//Implementation code comes here. }}
D) public class ExamServiceFactory : ServiceHostj public ExamServiceFactory(Type
serviceType, params Uri[] baseAddresses): base(serviceType, baseAddresses) {
//Implementation code comes here. }}

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) 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.
D) 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.

4. You want to upgrade a ASMX webservice to WCF, but you want to support legacy client applications.
<some code here>
What code do you use to transfer binary data from the server to the client?

A) BindingElement encoding = new MtomMessageEncodingBindingElement(.....)
B) BindingElement encoding = new TextMessageEncodingBindingElement (Soap12WSAddressingAugust2004..)
C) BindingElement encoding = new TextMessageEncodingBindingElement(MessageVersion.Soap11.....)
D) BindingElement encoding = new BindingElement()

5. You are creating a Windows Communication Foundation service by using Microsoft .NET
Framework 3.5.
The service will be hosted on a Web server. You add the following code fragment to the
.svc file.
<% @ServiceHost factory="ExamServicefactory" Service="ExamService" %>
You need to create the instances of the services by using the custom ExamServicefactory class.
Which code segment should you use?

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

Solutions: