WCF MCQs and Answers with Explanation: WCF MCQs and Answers is a comprehensive resource designed to help programmers test and enhance their knowledge of Windows Communication Foundation (WCF), a powerful framework for building distributed applications in .NET. These WCF Objective Questions and Answers cover various topics such as WCF architecture, endpoints, bindings, contracts, security, and more. With a vast array of questions and detailed answers, this resource is an invaluable tool for anyone looking to improve their WCF programming skills and prepare for interviews, exams, or any other programming challenges
WCF MCQ Questions with Answers
Further, to help the aspirants get an idea about the WCF concept we have included a brief introduction about it here, WCF (Windows Communication Foundation) is a framework for building connected, service-oriented applications. Developed by Microsoft, it is part of the .NET Framework and provides a unified platform for building distributed applications. With WCF, developers can create services that expose functionality to other applications, regardless of the platform or technology they are built on. Moreover, if you are a beginner or an experienced programmer, these WCF MCQ Questions with Answers offer an effective means of testing and evaluating your understanding of WCF and its applications in real-world scenarios.
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WCF Multiple Choice Questions
| Name | WCF (Windows Communication Foundation) |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 55 WCF MCQ Quiz Questions | WCF Quiz
1. What does WCF stand for?
A) Windows Communication Foundation
B) Web Communication Framework
C) World Communication Foundation
D) Web Connection Framework
Answer: A) Windows Communication Foundation
Explanation: WCF stands for Windows Communication Foundation. It is a framework used to build distributed applications.
2. Which protocol is used by WCF for communication?
A) HTTP
B) TCP
C) Both A and B
D) Neither A nor B
Answer: C) Both A and B
Explanation: WCF can use both HTTP and TCP protocols for communication.
3. What is the default binding used by WCF?
A) BasicHttpBinding
B) NetTcpBinding
C) WSHttpBinding
D) None of the above
Answer: A) BasicHttpBinding
Explanation: The BasicHttpBinding is the default binding used by WCF.
4. Which attribute is used to define a WCF service?
A) ServiceBehavior
B) ServiceContract
C) OperationContract
D) DataContract
Answer: B) ServiceContract
Explanation: The ServiceContract attribute is used to define a WCF service.
5. Which attribute is used to define an operation in a WCF service?
A) ServiceBehavior
B) ServiceContract
C) OperationContract
D) DataContract
Answer: C) OperationContract
Explanation: The OperationContract attribute is used to define an operation in a WCF service.
6. Which of the following is a binding in WCF?
A) BasicHttpBinding
B) WSHttpBinding
C) NetTcpBinding
D) All of the above
Answer: D) All of the above
Explanation: BasicHttpBinding, WSHttpBinding, and NetTcpBinding are all bindings in WCF.
7. Which of the following is not a message exchange pattern in WCF?
A) One-Way
B) Request-Reply
C) Duplex
D) All of the above are message exchange patterns in WCF
Answer: D) All of the above are message exchange patterns in WCF
Explanation: One-Way, Request-Reply, and Duplex are all message exchange patterns in WCF.
8. Which of the following is not a contract in WCF?
A) ServiceContract
B) OperationContract
C) DataContract
D) AttributeContract
Answer: D) AttributeContract
Explanation: AttributeContract is not a contract in WCF.
9. What is the default security mode used by NetTcpBinding?
A) None
B) Transport
C) Message
D) Both A and B
Answer: D) Both A and B
Explanation: The default security mode used by NetTcpBinding is both None and Transport.
10. Which of the following is not a behavior in WCF?
A) ServiceBehavior
B) EndpointBehavior
C) OperationBehavior
D) DataBehavior
Answer: D) DataBehavior
Explanation: Data behavior is not a behavior in WCF.
11. Which of the following is not a standard WCF binding?
A) WebHttpBinding
B) NetNamedPipeBinding
C) MSMQBinding
D) HttpBinding
Answer: D) HttpBinding
Explanation: HttpBinding is not a standard WCF binding.
12. What is the purpose of the ServiceBehavior attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To define a behavior for an operation
Answer: C) To define a behavior for a service
Explanation: The ServiceBehavior attribute is used to define a behavior for a service in WCF.
13. Which of the following is not a standard message encoding in WCF?
A) TextMessageEncoding
B) BinaryMessageEncoding
C) MtomMessageEncoding
D) JsonMessageEncoding
Answer: D) JsonMessageEncoding
Explanation: JsonMessageEncoding is not a standard message encoding in WCF.
14. Which of the following is not a standard WCF transport?
A) HttpTransport
B) TcpTransport
C) NamedPipeTransport
D) FTPTransport
Answer: D) FTPTransport
Explanation: FTPTransport is not a standard WCF transport.
15. What is the purpose of the OperationContract attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To define a behavior for an operation
Answer: B) To define an operation
Explanation: The OperationContract attribute is used to define an operation in WCF.
16. Which of the following is a correct example of a WCF endpoint address?
A) http://localhost/MyService/MyEndpoint
B) net.tcp://localhost/MyService/MyEndpoint
C) msmq://localhost/MyService/MyEndpoint
D) All of the above are correct examples
Answer: D) All of the above are correct examples
Explanation: http, net.tcp, and msmq are all valid protocols that can be used in a WCF endpoint address.
17. What is the purpose of the DataContract attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To define a data contract for a class
Answer: D) To define a data contract for a class
Explanation: The DataContract attribute is used to define a data contract for a class in WCF.
18. Which of the following is not a standard WCF channel?
A) IRequestChannel
B) IOutputChannel
C) IDuplexChannel
D) IDataChannel
Answer: D) IDataChannel
Explanation: IDataChannel is not a standard WCF channel.
19. What is the purpose of the FaultContract attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To define a fault contract for an operation
Answer: D) To define a fault contract for an operation
Explanation: The FaultContract attribute is used to define a fault contract for an operation in WCF.
20. Which of the following is not a WCF behavior configuration element?
A) ServiceBehavior
B) EndpointBehavior
C) OperationBehavior
D) BindingBehavior
Answer: D) BindingBehavior
Explanation: BindingBehavior is not a WCF behavior configuration element.
21. What is the purpose of the ServiceKnownType attribute in WCF?
A) To define a service
B) To define a data contract for a class
C) To specify types that can be serialized and deserialized by a service
D) To specify types that cannot be serialized and deserialized by a service
Answer: C) To specify types that can be serialized and deserialized by a service
Explanation: The ServiceKnownType attribute is used to specify types that can be serialized and deserialized by a service in WCF.
22. Which of the following is a standard WCF security mode?
A) None
B) Transport
C) Message
D) All of the above
Answer: D) All of the above
Explanation: None, Transport, and Message are all standard WCF security modes.
23. What is the purpose of the WebGet attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To specify an HTTP GET operation in a RESTful WCF service
Answer: D) To specify an HTTP GET operation in a RESTful WCF service
Explanation: The WebGet attribute is used to specify an HTTP GET operation in a RESTful WCF service.
24. What is the purpose of the CallbackContract attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To define a callback contract for a duplex service
Answer: D) To define a callback contract for a duplex service
Explanation: The CallbackContract attribute is used to define a callback contract for a duplex service in WCF.
25. Which of the following is a standard WCF security algorithm?
A) None
B) Basic
C) Windows
D) AES256
Answer: D) AES256
Explanation: None, Basic, and Windows are authentication modes. AES256 is a security algorithm used for data protection.
26. What is the purpose of the IncludeExceptionDetailInFaults attribute in WCF?
A) To include exception details in SOAP faults
B) To include exception details in HTTP responses
C) To disable exception details in SOAP faults
D) To disable exception details in HTTP responses
Answer: A) To include exception details in SOAP faults
Explanation: The IncludeExceptionDetailInFaults attribute is used to include exception details in SOAP faults in WCF.
27. Which of the following is not a standard WCF message contract type?
A) Request
B) Response
C) Fault
D) Notification
Answer: D) Notification
Explanation: Notification is not a standard WCF message contract type.
28. What is the purpose of the Principal Permission attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To specify security requirements for an operation based on the current user’s role or identity
Answer: D) To specify security requirements for an operation based on the current user’s role or identity
Explanation: The PrincipalPermission attribute is used to specify security requirements for an operation based on the current user’s role or identity in WCF.
29. Which of the following is a standard WCF session mode?
A) None
B) PerCall
C) PerSession
D) Singleton
Answer: C) PerSession
Explanation: None, PerCall, PerSession, and Singleton are all standard WCF session modes.
30. Which of the following is not a standard WCF endpoint behavior?
A) ServiceMetadata
B) ServiceDebug
C) ServiceThrottling
D) ServiceBinding
Answer: D) ServiceBinding
Explanation: ServiceBinding is not a standard WCF endpoint behavior.
31. What is the purpose of the XmlSerializerFormat attribute in WCF?
A) To specify the message format for a WCF service
B) To specify the serialization format for a WCF service
C) To specify the data contract format for a WCF service
D) To specify the security format for a WCF service
Answer: B) To specify the serialization format for a WCF service
Explanation: The XmlSerializerFormat attribute is used to specify the serialization format for a WCF service.
32. Which of the following is a standard WCF binding that supports WS-ReliableMessaging?
A) NetTcpBinding
B) BasicHttpBinding
C) WsHttpBinding
D) NetNamedPipeBinding
Answer: C) WsHttpBinding
Explanation: WsHttpBinding is a standard WCF binding that supports WS-ReliableMessaging.
33. What is the purpose of the MessageBodyMember attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To specify a parameter as a message body member in a message contract
Answer: D) To specify a parameter as a message body member in a message contract
Explanation: The MessageBodyMember attribute is used to specify a parameter as a message body member in a message contract in WCF.
34. Which of the following is a standard WCF authentication mode?
A) None
B) Basic
C) Windows
D) NTLM
Answer: C) Windows
Explanation: None, Basic, Windows, and NTLM are all standard WCF authentication modes.
35. What is the purpose of the OperationBehavior attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To define a callback contract for a duplex service
Answer: C) To define a behavior for a service
Explanation: The OperationBehavior attribute is used to define a behavior for a service in WCF.
36. Which of the following is not a standard WCF service behavior?
A) ServiceThrottling
B) ServiceDebug
C) ServiceMetadata
D) ServiceSecurity
Answer: D) ServiceSecurity
Explanation: ServiceSecurity is not a standard WCF service behavior.
37. Which of the following is a standard WCF message header type?
A) Body
B) Action
C) To
D) From
Answer: B) Action
Explanation: Body, Action, To, and From are all standard WCF message header types.
38. Which of the following is not a standard WCF transport protocol?
A) HTTP
B) TCP
C) UDP
D) MSMQ
Answer: C) UDP
Explanation: HTTP, TCP, and MSMQ are standard WCF transport protocols, but UDP is not.
39. Which of the following is a standard WCF instance mode?
A) PerSession
B) PerCall
C) Single
D) All of the above
Answer: D) All of the above
Explanation: PerSession, PerCall, and Single are all standard WCF instance modes.
40. What is the purpose of the MessageContract attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To define a message contract for a WCF operation
Answer: D) To define a message contract for a WCF operation
Explanation: The MessageContract attribute is used to define a message contract for a WCF operation.
41. Which of the following is a standard WCF service contract type?
A) ServiceContract
B) OperationContract
C) FaultContract
D) MessageContract
Answer: A) ServiceContract
Explanation: ServiceContract is a standard WCF service contract type.
42. What is the purpose of the DataMember attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To specify a data member as part of a data contract in WCF
Answer: D) To specify a data member as part of a data contract in WCF
Explanation: The DataMember attribute is used to specify a data member as part of a data contract in WCF.
43. What is the purpose of the OperationContext class in WCF?
A) To provide access to the current operation’s input parameters
B) To provide access to the current operation’s output parameters
C) To provide access to the current operation’s context information
D) To provide access to the current operation’s faults
Answer: C) To provide access to the current operation’s context information
Explanation: The OperationContext class is used to provide access to the current operation’s context information in WCF.
44. Which of the following is a standard WCF message body type?
A) Header
B) Envelope
C) Fault
D) All of the above
Answer: B) Envelope
Explanation: Header, Envelope, and Fault are all standard WCF message body types.
45. Which of the following is a standard WCF serialization format?
A) Binary
B) XML
C) JSON
D) All of the above
Answer: D) All of the above
Explanation: Binary, XML, and JSON are all standard WCF serialization formats.
46. What is the purpose of the FaultException class in WCF?
A) To handle errors in a WCF service
B) To handle faults in a WCF service
C) To handle exceptions in a WCF service
D) None of the above
Answer: C) To handle exceptions in a WCF service
Explanation: The FaultException class is used to handle exceptions in a WCF service.
47. Which of the following is a standard WCF binding element?
A) Security
B) Encoding
C) Transport
D) All of the above
Answer: D) All of the above
Explanation: Security, Encoding, and Transport are all standard WCF binding elements.
48. What is the purpose of the MessageHeader attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To specify a message header as part of a message contract in WCF
Answer: D) To specify a message header as part of a message contract in WCF
Explanation: The MessageHeader attribute is used to specify a message header as part of a message contract in WCF.
49. Which of the following is not a standard WCF authentication mode?
A) Windows
B) Forms
C) Basic
D) Token
Answer: B) Forms
Explanation: Windows, Basic, and Token are all standard WCF authentication modes, but Forms is not.
50. Which of the following is a standard WCF binding type?
A) BasicHttpBinding
B) NetTcpBinding
C) WSHttpBinding
D) All of the above
Answer: D) All of the above
Explanation: BasicHttpBinding, NetTcpBinding, and WSHttpBinding are all standard WCF binding types.
51. Which of the following is a standard WCF message contract type?
A) ServiceContract
B) OperationContract
C) FaultContract
D) MessageContract
Answer: D) MessageContract
Explanation: MessageContract is a standard WCF message contract type.
52. Which of the following is a standard WCF instance context mode?
A) PerCall
B) PerSession
C) Single
D) All of the above
Answer: D) All of the above
Explanation: PerCall, PerSession, and Single are all standard WCF instance context modes.
53. Which of the following is a standard WCF service contract mode?
A) Duplex
B) Simplex
C) Streamed
D) All of the above
Answer: D) All of the above
Explanation: Duplex, Simplex, and Streamed are all standard WCF service contract modes.
54. Which of the following is a standard WCF concurrency mode?
A) Single
B) Multiple
C) Reentrant
D) All of the above
Answer: D) All of the above
Explanation: Single, Multiple, and Reentrant are all standard WCF concurrency modes.
55. What is the purpose of the ServiceAuthorization attribute in WCF?
A) To define a service
B) To define an operation
C) To define a behavior for a service
D) To specify an authorization policy for a WCF service
Answer: D) To specify an authorization policy for a WCF service
Explanation: The ServiceAuthorization attribute is used to specify an authorization policy for a WCF service.
In conclusion, WCF MCQs and Answers provide a valuable resource for programmers looking to enhance their understanding and proficiency in this powerful framework for building distributed applications in .NET. These WCF Multiple Choice Questions cover a broad range of topics, offering an effective means of testing and evaluating one’s knowledge of WCF and preparing for interviews, exams, or any other programming challenges. Follow us @Freshersnow for more Technical Quizzes.