WSDL Subjective Questions And Answers

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WSDL Interview Questions And Answers

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Questions 1 What is WSDL?

Answer
WSDL is stands for Web Services Description Language.Basically WSDL is fully based on XML.Main use of WSDL to describe the web services and also told how to use this web services.It is written on XML. Also WSDL has W3C Recommendation 
Since 26 June 2007.

Questions 2 How you define WSDL document?

Answer
 WSDL given us many element to describe its document. I have only given you four elements which are main elements to describing WSDL document.
These are:
1. <portType> is an important element to describe WSDL document.Using this element we can perform a task to compare a function library(like: class) in traditional programming language.
2. each <message> element has more than one parts.we can compare that parts.
3. using <types> we can define datatypes that are used in web services.
4.using <binding> for each port we can define the format of messages and details of protocol.
syntax:
<definitions>
<types>
   To define type here
</types>
<message>
   To define message here
</message>
<portType>
   To define portType here
</portType>
<binding>
   To define binding here
</binding>
</definitions>

Questions 3 How you define Binding in WSDL?

Answer
 Basically we use binding in WSDL to define format of messages and detailed information about protocol of web services.
 I have given you binding consist of two attributes.
these are name attribute and type attribute(name is used to define binding name where as type is used to define binding port.
 I case of SOAP binding it has two attribute. These are style and transport attribute.
Example:
<message name="getTermRequest">
   <part name="term" type="xs:string"/>
</message>
<message name="getTermResponse">
   <part name="value" type="xs:string"/>
</message>
<portType name="glossaryTerms">
  <operation name="getTerm">
      <input message="getTermRequest"/>
      <output message="getTermResponse"/>
  </operation>
</portType>
<binding type="glossaryTerms" name="b1">
<soap:binding style="document"
transport="http://xyzsoap.org/soap/http" />
  <operation>
    <soap:operation
     soapAction="http://soapexample.com/getTerm"/>
    <input>
      <soap:body use="literal"/>
    </input>
    <output>
      <soap:body use="literal"/>
    </output>
  </operation>
</binding>

Questions 4 What is WSDL and disco file ?

Answer
WSDL: Files with the WSDL extension contain web service 
interfaces expressed in the Web Service Description 
Language (WSDL). WSDL is a standard XML document type 
specified by the World Wide Web Consortium.

WSDL files are used to communicate interface information 
between web service producers and consumers. A WSDL 
description allows a client to utilize a web service?s 
capabilities without knowledge of the implementation 
details of the web service.


Disco: It is a Microsoft technology for publishing and 
discovering Web Services. DISCO can define a document 
format along with an interrogation algorithm, making it 
possible to discover the Web Services exposed on a given 
server. DISCO makes it possible to discover the 
capabilities of each Web Service (via documentation) and 
how to interact with it. To publish a deployed Web Service 
using DISCO, you simply need to create a .disco file and 
place it in the vroot along with the other service-related 
configuration.

Questions 5 What is the history of the WSDL?

Answer
WSDL 1.1 was submitted as a W3C Note by Ariba, IBM and Microsoft for describing services for the W3C XML Activity on XML Protocols in March 2001.WSDL 1.1 has not been endorsed by the World Wide Web Consortium (W3C), however it has just (May 11th, 2005) released a draft for version 2.0, that will be a recommendation (an official standard), and thus endorsed by the W3C.

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