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Web Services Interview Questions and Answers

Ques. What is WSDL?
Ans. The Web Services Description Language (WSDL) currently represents the service description layer within the Web service protocol stack. In a nutshell, WSDL is an XML grammar for specifying a public interface for a Web service. This public interface can include the following:

Information on all publicly available functions. Data type information for all XML messages. Binding information about the specific transport protocol to be used.
Address information for locating the specified service.

WSDL is not necessarily tied to a specific XML messaging system, but it does include built-in extensions for describing SOAP services.

Below is a sample WSDL file. This file describes the public interface for the weather service used in the SOAP example above. Obviously, there are many details to understanding the example. For now, just consider two points.
First, the elements specify the individual XML messages that are transferred between computers. In this case, we have a getWeatherRequest and a getWeatherResponse.
Second, the element specifies that the service is available via SOAP and is available at a specific URL.
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