What are the differencec between Web Services and WCF ?

Sno	WebServices	WCF
1	Can send/receive messages using SOAP over HTTP	Can send/receive using SOAP and any transport protocol like HTTP, TCP, named pipes, and Microsoft Message Queuing (MSMQ), etc.
2	Can only be hosted in IIS and the security is limited.	Can be hosted in IIS, self-host servers with console applications or Win NT services or any other server.
3	Doesnt support	supports binary .NET – .NET communications, distributed transactions, WS-* specifications, queued messaging and Restful communications.
4	Simple when compared to WCF	Little more work is needed

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Can you call WebServices from jQuery ?

yes.

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How will declare a one way communication method in a ASP.NET Webservice?

[SoapDocumentMethod(OneWay=true)]
[WebMethod()]
public void AOneWayComm()
{
//
}

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What is the expansion of WSE?

Web Services Enhancements.

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What is the extension of WCF services hosted in IIS?

.svc

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What is REST?

Representational State Transfer .

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Is it true that Webservices can be written only in .NET ?

No.

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What does SOAP stand for?

Simple Object Access Protocol.

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What does WSDL stand for?

Web Services Description Language.

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Can a web service be used in a windows application?

Yes.

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Can a web service be used in a windows application?

Yes.

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Can we call a web service asynchronously?

Yes.

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Can a web service be only developed in asp.net?

No. You can develop in whichever language allows you.

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Can we use multiple web services from a single application?

Yes.

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Can a web service be used from a windows application?

Yes.

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What is the key communication protocol in XML web services?

SOAP(Simple Object Access Protocol) .

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What is an UDDI?

The UDDI (Universal Description, Discovery, and Integration) specifications define a standard way to publish and discover information about XML Web services.

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What are the four steps in which a XML Web Service is accessed by a client from the server?

1. Client searches for a XML web service in UDDI, the UDDI returns the URL for the discovery document
2. Client requestes the discovery document from the XML Web service server, and it is returned.
3. Client then asks for the Web service description, server returns it.
4. Finally it requests the desired XML web service and it is returned.

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How will you generate a Proxy source code from a SDL or WSDL file ?

You can generate a Proxy source code from a SDL or WSDL file using the tool,WebServiceUtil.exe.
Ex:
WebServiceUtil.exe /command:proxy WSConcat.sdl /language:VB

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What is full form of WSDL ?

Web Service Description Language

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