WCF Interview Questions and Answers
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Best WCF Interview Questions and Answers
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Q1) What is the full form of WCF?
Answer: The full form of WCF is the Windows Communication Framework.
Q2) Which was the initial code name for WCF?
Answer: The initial code name for WCF was Indigo.
Q3) What is the primary function of WCF?
Answer: To make the communication between various processes in a given system easier is the main function of WCF.
Q4) What are some of the other purposes WCF serves as well?
Answer: WCF is also used for other functions like queuing, services, MS messaging and remoting.
Q5) With WCF can one communicate with other non-Microsoft applications also?
Answer: Yes, one can communicate with other non-Microsoft applications like J2EE as well.
Q6) State the three main components of WCF.
Answer: The three main components of WCF are as follows… endpoints, hosting environment and service class.
Q7) What is the model of functionality that WCF follows?
Answer: The model of functionality that WCF follows is… software as a service.
Q8) How does software as a service work?
Answer: The way this model works is that each point is a source of connecting either with a client or with any other services involved. Thus as a program, it shows a collection of endpoints.
Q9) State the main difference between ASMX web services and WCF.
Answer: The main difference between the aforementioned two systems is that the former can send & receive messages only via HTTP and the latter can do so with any format over any protocol.
Q10) State the three main points in WCF.
Answer: The three main points in WCF are as follows… binding, contract, and address.
Q11) State the types of contracts in WCF.
Answer: The types of contracts in WCF are as follows…service contracts, data contracts, fault contracts, message contracts.
Q12) State some of the transport schemes that WCF contains.
Answer: Some of the transport schemes that WCF supports are as follows… HTTP, TCP, IPC (inter-process communication), MSMQ and Peer Network.
Q13) What are some of the ways to host a WCF service?
Answer: Some of the ways to host a WCF service are as follows… IIS, self-hosting, and WAS (Windows Activation Service).
Q14) State which are the different instance modes in WCF?
Answer: The different instance modes in WCF are as follows…per call, per session and single.
Q15) What do you understand by Service Proxy in WCF?
Answer: The main function of a service proxy is to help the various applications send and receive messages. It’s an aspect that encompasses aspects like service path, platform, communication protocol, and service implementation technology.
Q16) What is the full form of SOA
Answer: The full form of SOA is Service-Oriented Architectural.
Q17) What is the function of SOA?
Answer: The main function of SOA is to decipher how two computing entities will work best with each other to gain business optimization and also how individually if both entities can work on behalf of each other.
Q18) State the types of data contracts in WCF
Answer: The types of contracts in WCF are as follows… Data Contract and Data Member
Q19) Mention the three types of transaction managers that WCF contains.
Answer: The three types of transaction managers that WCF has are as follows…Light Weight, WS-Atomic Transaction and OLE Transaction.
Q20) What is the full form of MEP?
Answer: The full form of MEP is the Message Exchange Pattern.
Q21) State the types of MEPs which are available in WCF.
Answer: The three types of MEP which are available in WCF are as follows…Data Gram, Request and Response, Duplex.
Q22) Which is the namespace used to access WCF?
Answer: The namespace that is used to access WCF is known as System.ServiceModel
Q23) State the types of binding that WCF encompasses.
Answer: The different types of binding which are there in WCF are as follows… BasicHttpBinding, NetMsmqBinding, NetTcpBinding and WSHttpBinding.
Q24) What do you understand by the data contract serializer?
Answer: When the format of an object is changed to a transferable and mobility induced one, it is known as serialization. When data is serialized, it is known as data contract serializer.
Q25) What is the full form of REST?
Answer: The full form of REST is Representational State Transfer.
Q26) In WCF what are the various isolation levels which are given?
Answer: The various isolation levels in WCF are as follows… Read Uncommitted, Read Committed, Repeatable Read and Serializable.
Q27) State the contract that is used to rectify errors in WCF
Answer: The contract that is used to correct mistakes is known is Fault Contract.