MCTS Windows Communication Foundation (WCF) 3

Question 1

In IIS-hosted WCF services, what is the purpose of a .svc file?

Accepted Answer

It is the entry point that IIS uses to activate and route requests to the correct WCF service type

Answer

It stores the WCF service configuration such as bindings and endpoints

Answer

It contains the data contract definitions for the service

Answer

It defines the WSDL metadata exposed to clients

Question 2

Which WCF binding provides built-in support for WS-ReliableMessaging to guarantee ordered, exactly-once message delivery?

Accepted Answer

WSHttpBinding

Answer

BasicHttpBinding

Answer

NetTcpBinding

Answer

WebHttpBinding

Question 3

What does the [OperationContract(IsOneWay = true)] attribute setting do for a WCF service method?

Accepted Answer

It configures the method so the client sends a message and does not wait for a reply

Answer

It makes the method return data asynchronously

Answer

It enables duplex callback on the method

Answer

It streams the response back in chunks

Question 4

Which WCF configuration element controls the maximum number of concurrent calls, sessions, and instances a service can handle?

Accepted Answer

serviceThrottling

Answer

serviceMetadata

Answer

serviceDebug

Answer

serviceCredentials

Question 5

What interface must a class implement to create a custom WCF message inspector that inspects or modifies messages before they are processed?

Accepted Answer

IDispatchMessageInspector

Answer

IServiceBehavior

Answer

IParameterInspector

Answer

IOperationBehavior

Question 6

In WCF, which transport credential type should be used when clients authenticate with a Windows domain account over NetTcpBinding?

Accepted Answer

Windows

Answer

Certificate

Answer

UserName

Answer

Basic

Question 7

Which WCF feature allows a service to route incoming messages to different backend service instances based on message content or headers?

Accepted Answer

Message Routing Service

Answer

Service Discovery

Answer

Service Throttling

Answer

Duplex Channel