1. Which type of file must be provided while hosting a Windows Communication Foundation (WCF) service under the Internet Information Services (IIS) or the Windows Process Activation Service (WAS)?
Answer
Correct Answer:
.svc file
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2. In WCF, what is the significance of the ReceiveRetryCount property of a Poison message in the .Net Framework 4.0?
Answer
Correct Answer:
It is an integer value that indicates the maximum number of times to retry delivery of a message from the application queue to the application.
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3. Which of the following is/are the address format(s) in WCF (Windows Communication Foundation) 4.0? 1. http://localhost: 2. net.msmq://localhost: 3. net.tcp://localhost:
Answer
Correct Answer:
All of the three
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4. Which of the following operating systems supports the Message Queuing functionality of WCF?
Answer
Correct Answer:
Windows Vista
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5. Extension of a WCF 4 service is _______.
Answer
Correct Answer:
.svc
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6. Suppose your WCF service root URL is "http://examples.svc". What will be the response when you request a WCF data service URL with a $skip system query option, as shown below, in the .Net Framework 4.0? http://examples.svc/Products?$skip=2&$top=2&$orderby=Rating
Answer
Correct Answer:
The response will be the third and fourth product entries from the collection of all products after sorting the collection in ascending order of Rating.
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7. What is meant by a proxy for WCF service?
Answer
Correct Answer:
It is a class through which a service client and the service can interact.
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8. Which of the following statements is false about WCF sessions?
Answer
Correct Answer:
There is a general data store associated with a WCF session.
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9. State True/False. The WCF service can send and receive a message only through the Simple Object Access Protocol (SOAP).
Answer
Correct Answer:
False
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10. Which of the following options is not an isolation level provided in WCF 4?
Answer
Correct Answer:
SNAPSHOT
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11. State True/False. In WCF 4, the DataContractSerializer translates the hash table into XML format.
Answer
Correct Answer:
True
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12. State True/False. Can you host a Windows Communication Foundation 4 service on two different protocols on a single server?
Answer
Correct Answer:
Yes
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13. In WCF 4, which of the following file(s) is/are used to define contract(s)? 1. IService.cs 2. Service.cs
Answer
Correct Answer:
1 only
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14. Which of the following OData system query options is used to determine the maximum number of records to be returned in the .Net Framework 4.0?
Answer
Correct Answer:
$top
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15. Which of the following is the default binding used in WCF 4?
Answer
Correct Answer:
WSHttpBinding
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16. Which of the following bindings in WCF 4 is used to connect to other WCF endpoints on the same machine/computer?
Answer
Correct Answer:
NetNamedPipeBinding
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17. From the following options, select the correct endpoint that is used to expose Ajax services?
Answer
Correct Answer:
webScriptEndpoint
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18. Which of the following statements is correct about the WSHttpBinding of WCF in the .Net framework 4.0?
Answer
Correct Answer:
It is a secure and inter-operable binding that is suitable for non-duplex service contracts.
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19. Which of the following is an incorrect statement regarding Windows Communication Foundation (WCF) 4.
Answer
Correct Answer:
Windows Communication Foundation (WCF) 4 supports SOAP but not REST
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20. Which of the following is/are the way(s) of hosting the WCF service?
Answer
Correct Answer:
All of the above
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21. What is the function of the WCF Data contracts in the .Net Framework 4.0?
Answer
Correct Answer:
They define, for each parameter or return type, what data is serialized to be exchanged.
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22. Which of the following about WCF is false?
Answer
Correct Answer:
DataContractSerializer Class serializes the public members only.
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23. Each WCF endpoint contains: 1.address 2.binding 3.contract
Answer
Correct Answer:
1, 2 and 3
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24. In which type of authentication does the service host check and validate the caller certificate information for service authentication that was sent by the client to the service communication?
Answer
Correct Answer:
X509 certificates
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25. Which of the following endpoints in Windows Communication Foundation 4 describes a standard endpoint that is configured to use Windows Communication Foundation discovery in the application of a Windows Communication Foundation client?
Answer
Correct Answer:
dynamicEndpoint
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26. Which of the following is false about WCF?
Answer
Correct Answer:
WCF returns unhandled exceptions to the client as Simple Object Access Protocol(SOAP) faults.
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27. How many columns can you select by the $orderby OData system query option in the .Net Framework 4.0?
Answer
Correct Answer:
12
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28. A generic Windows Communication Foundation (WCF) routing implementation that can be used within your applications is provided by the _________ Class in WCF 4.
Answer
Correct Answer:
RoutingService
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29. The internal threading model that provides support for multi-threaded services is controlled by ____?
Answer
Correct Answer:
ConcurrencyMode
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30. Which of the following error handling methods is not used by WCF to handle application errors?
Answer
Correct Answer:
Directly handling the exception thrown
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31. Which of the following forms of serialized XML is supported by the DataContractSerializer?
Answer
Correct Answer:
Literal
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32. Which of the following encoding mechanisms is not used by WCF 4?
Answer
Correct Answer:
DIME
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33. Which of the following properties of the endpoints of the WCF service helps to identify the operations available?
Answer
Correct Answer:
Contract
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34. From the following options, select the interface that is used to clear the Windows token cache on demand.
Answer
Correct Answer:
ILogonTokenCacheManager
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35. Which of the following pre-defined bindings is incorrect with regards WCF 4?
Answer
Correct Answer:
NetDualMsmqBinding
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36. In WCF 4, the service contracts are like ________ and the operation contracts are like __________.
Answer
Correct Answer:
Interfaces, Methods
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37. Which of the following namespaces contains classes through which we can send and receive messages from workflows?
Answer
Correct Answer:
System.ServiceModel.Activities
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38. Which of the following situations can cause a proxy/channel error?
Answer
Correct Answer:
A contract mismatch existing between the client and the service.
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39. Which of the following pieces of information is provided by the WCF service contract in the .Net Framework 4.0?
Answer
Correct Answer:
All of the above.
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40. What is the use of the "Finalize" method of "SoapProcessingBehavior" class in WCF 4?
Answer
Correct Answer:
It allows the objects to release/free resources before they are reclaimed by garbage collection.
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41. Following are the disarranged steps for the programming life cycle of Windows Communication Foundation (WCF). 1. Build the client application. 2. Define the Service Contract. 3. Host the service in an application. 4. Configure the Service by specifying endpoint information and other behavior information. 5. Implement the Service Contract. Which of the given answer options is the correct arrangement of the steps?
Answer
Correct Answer:
2, 5, 4, 3, 1
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42. For which of the following options it is an advantage that data is transmitted in a text format rather than a binary format?
Answer
Correct Answer:
XML
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WCF (Windows Communication Foundation) MCQs | Topic-wise
