XML Interview Question and Answers

1. Define XML?
 
  • The Extensible Markup Language (XML) was developed in 1996 by the World Wide Web Consortium's (W3C's) XML working group.
  • XML is a widely supported open technology for describing data that has become the standard format for data exchanged between applications over the internet.
 
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2. What is the advantage of XML?
 
  • XML is simple, platform independent and is a widely adopted standard.
  • The power of XML is that it separates the user interface from the structured data.
  • This separation of data from presentation enables the integration of data from diverse sources.
 
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3. Give any two differences between the Xml Reader and Xml Node Reader?
 
  • Xml Node Reader Processes the nodes from an in memory DOM tree Structure rather than a text file.
  • Xml Node Reader can begin reading at any sub tree node in the structure. Not just at the root node.
 
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4. What are the important in XML?
 
  • Placing white space characters before the XML declaration is an error.
  • The start tag must have a matching end tag.
  • XML is case sensitive.
  • Using a white space character in an XML element name is an error.
  • Nesting XML tags improperly is a syntax error.
 
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5. What is the need for serialization in XML?
 
  • Serialization is a convenient way to store objects so they can later be deserialized into the original objects.
  • Then the objects can be converted to an XML format.
 
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