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

1. A Windows Communication Foundation (WCF) client communicates with a service. You created the client proxy by using Add Service Reference in Microsoft Visual Studio.
You need to ensure that the client accepts responses of up to 5 MB in size.
What should you change in the configuration file'?

A) the value of the maxBytesPerRead attribute to 5242880
B) the value of the maxBufferPoolSize attribute to 5242880
C) the value of the maxBufferSize attribute to 5242880
D) the value of the maxReceivedMessageSize attribute to 5242880

2. The endpoint of a Windows Communication Foundation (WCF) service uses basicHttpBinding for its binding Your Company's policies have changed to require that messages not be sent in clear text.
You must ensure that all messages are encrypted when traveling across the network What should you do?

A) Set the ProtectionLevelAttribute on the service contract and update the bindingConfiguration attribute in the endpoint element of the configuration file to webHttpBinding
B) Set the ProtectionLevelAttribute on the service contract and update the binding attribute in the endpoint element of the configuration file to wsHttpBinding
C) Set the PrincipalPermissionAttribute on the service contract and update the binding attribute in the endpoint element of the configuration file to wsHttpBinding
D) Set the PrincipalPermissionAttribute on the service contract and update the bindingConfiguration attribute in the endpoint element of the configuration file to wsHttpBinding.

3. A Windows Communication Foundation (WCF) solution provides a session-based counter.
The service is self-hosted. The hosting code is as follows.
Dim host As ServiceHost = New ServiceHost(GetType(CounterService))
Dim bnding As NetTcpBinding =
New NetTcpBinding(SecurityMode.None)
host.AddServiceEndpoint("MyApplication. ICounterService",
binding, "net.tcp://localhost:23456")
host. Open()
This service is currently exposed over TCP, but needs to be exposed to external clients over HTTP.
Therefore, a new service endpoint is created with the following code.
host.AddServiceEndpoint(''MyApplication. lCounterService",
binding2, "http:/!localhost:12345'
You need to complete the implementation and ensure that the session-based counter will perform over HTTP as it does over TCP.
What should you do?

A) Define binding2 as follows.
Dim binding2 As BasicHttpBinding = New BasicHttpBinding(BasicHttpSecurityMode.None)
Enable cookies for
binding2.
binding2.AllowCookies = True
B) Define binding2 as follows.
Dim binding2 As BasicHttpBinding = New BasicHttpBinding(BasicHttpSecurityMode. None)
add the following behavior to the service implementation.
<ServiceBehavior(lnstanceContextMode:
1nstanceContextMode.Single)>
C) Define binding2 as follows.
Dim binding2 As WSHttpBinding = - New WSHttpBinding(SecurityMode.None) Add the
following behavior to the service implementation. <ServceBehavior(lnstanceContextMode:
1nstanceContextMode.PerSession)s
D) Define binding2 as follows.
Dim binding2 As WS2007HttpBinding =
New WS200lHttpBinding(SecurityMode. None) Configure binding2 as follows.
binding2.ReliableSession.Enabled = True

4. You have a Windows Communication Foundation (WCF) service.
The service has issues with performance when it receives messages on a specific endpoint. The service must collect the minimum number of performance counters to diagnose the message issues.
You need to configure the service.
In the web.config file for the service, what should you do?

A) In the service configuration diagnostics section, set the value of the performancCounters property to All.
B) Enable the Windows Management Instrumentation (WMI) provider.
C) In the service configuration diagnostics section, set the value of the performanceCounters property to ServiceOnly.
D) Enable message logging for the endpoint.

5. You are developing a Windows Communication Foundation (WCF) client application.
You instantiate a client class that inherits from ClientBase. The client instance must always be shut down in such a way that it can free up any resources it is referencing. You need to ensure that all exceptions are caught and the instance is always properly shut
down.
Which code segment should you use?

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

Solutions:

Question # 1 Answer: D

Question # 2 Answer: B

Question # 3 Answer: D

Question # 4 Answer: A

Question # 5 Answer: A