XML Subjective Questions And Answers

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XML Interview Questions And Answers

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Questions 1 What is the XML? Explain it.

Answer
 XML is stands for eXtensible Markup Language.It is invented
by World Wide Web Consortium(W3C). Don't Confuse with that 
HTML and XML are same.For efficient use of XML you should 
know HTML and JavaScript.I have given you some basic features
of XML.
1.It is called extensible because using XML you can create
own tags as per requirement.
2.XML is used to communicate and store the data,not to show
the data.
3.Using XML we can identify our information in a more accurate,
flexible and adaptable way.
4.It is used to make about structural information of data.
5.XML is a Metalanguage(Language use for describing other language.)

Answer
XML stand for EXtensible Markup Language.

Questions 2 How we can say XML is differ from HTML?

Answer
Both XML(eXtensible Markup Language) and HTML(Hyper Text Markup Language)are markup languages.But they are different.I have given you some main difference b/w XML and HTML given below.
1.The key difference is that XML is used for to store data and made communication b/w them.Where HTML is used to present the data in attractive way.
2.In XML we emphasize on 'what data is'. Where as in HTML we emphasize on 'What data looks like'.
3.In HTML tag semantic and tag set are fixed means that in HTML their is no made our own tags.where as in XML these are not fixed so, can we made our own tags as per requirement.
4.XML is dynamic where as HTML is static.
5.HTML is case sensitive language where as XML is non-case sensitive language.
6.In XML it is mandatory to close all open tags where as in HTML their is not mandatory to close all open tags.

Questions 3 What do you understand about XML Namespaces and Linking?

Answer
 I have you some information about XML Namespaces and XML Linking.
XML Namespaces:
 XML give as facility to make our own tags. Suppose if we want add element of two XML sheets their may be conflicts. But if we made our own tags than it can solve the problem of data conflicts,because different tags may contain the same type of data.
XML Linking:  
 Using XML linking we can create the connection among the XML data means they can communicate each other.
XML Linking(XML Link,XML Pointer & XML Base)
 Where,
 XML Link is used to insert link into XML Sheets.
 XML Pointer is used to link the address of some specific data in XML sheets.
 XML Base is used to defining a default reference to external XML resources.

Questions 4 What do you understand about XPath?

Answer
XPath is stands for XML Path Language.That is used to addressed
the element of XML Document.In XML document we define our data
in terms of tree.It is used to address the element and their 
attribute at any level.I have given you a example this shows 
how to address parts of XML.
Example:
 /xyz:Employeedatabase/xyz:Empname/@EmpID 
 Using above we can address the EmpID.

Questions 5 What you define SAX in XML?

Answer
 SAX is stands for Simple API for XML.It is a lexical and event-driven interface.Implementation of SAX is fast and efficient but we can't extract information from XML at random.It is good for use when some types of information ewe handle in same way always without knowing that where it execute in document.  
How to use SAX in XML:
  
# Use to get a list of known parsers
my $parsers = XML::SAX->parsers();
# Use to add/update a parser
XML::SAX->add_parser(q(XML::SAX::PurePerl));
# Use to remove parser
XML::SAX->remove_parser(q(XML::SAX::Foodelberry));
# Use to save parsers
XML::SAX->save_parsers()