MCSD Windows Communication Foundation (WCF)

Question 1

Which three core components form the ABC of WCF service configuration?

Accepted Answer

Address, Binding, Contract

Answer

WCF services are defined by Address (where), Binding (how), and Contract (what), collectively called the ABCs of WCF.

Question 2

Which attribute is used to mark an interface as a WCF service contract?

Accepted Answer

[ServiceContract]

Answer

[ServiceContract] is applied to an interface or class to define it as a WCF service contract that clients can call.

Question 3

Which WCF binding is optimized for cross-machine communication over HTTP and interoperability with non-.NET clients?

Accepted Answer

BasicHttpBinding

Answer

BasicHttpBinding uses SOAP 1.1 over HTTP, making it the most interoperable binding for non-.NET clients.

Question 4

Which WCF binding provides the highest performance for same-machine inter-process communication?

Accepted Answer

NetNamedPipeBinding

Answer

NetNamedPipeBinding uses Windows named pipes for communication within the same machine, providing the highest performance for local IPC.

Question 5

What does the [OperationContract] attribute designate in a WCF service?

Accepted Answer

A method that is part of the service contract

Answer

[OperationContract] marks a method on a [ServiceContract] interface as an operation that clients can invoke remotely.

MCSD Exam Practice Test