10 Xml Interview Questions As Well As Answers For Coffee Programmer

XML Interview questions are rattling pop inward diverse programming chore interviews, including Java interviews for spider web developer. XML is a matured technology scientific discipline together with often used as measure for transporting information from ane platform other. XML Interview questions contains questions from diverse XML technologies similar XSLT which is used to transform XML files, XPATH, XQuery together with fundamentals of XML e.g. DTD or Schema. In this article nosotros volition run across 10 often asked XML Interview questions together with answers from inward a higher house topics. These questions are by together with large asked inward diverse Java interviews but they are as useful inward other programming interviews  like C, C++, Scala or whatever other programming language. Since XML is non tied amongst whatever programming linguistic communication together with similar SQL its ane of the desired science inward programmer, it brand feel to practise closed to XML questions earlier appearing inward whatever technical chore interview

XML Interview Questions together with Answers

Here is my listing of closed to mutual together with often asked Interview questions on XML technologies.  Questions on this listing is non rattling tough but touches closed to of import areas of XML technologies e.g. DTD, XML Schema, XSLT transformations, XPATH evaluation, XML binding, XML parsers together with fundamentals of XML e.g. namespace, validation, attribute, elements etc.

Question 1: What is XML ?

Answer : XML stands for Extensible Markup linguistic communication which agency you lot tin extend XML based upon your needs. You tin define custom tags similar <books>, <orders> etc inward XML easily as opposed to other mark-up linguistic communication similar HTML where you lot demand to piece of job amongst predefined tags e.g. <p> together with you lot tin non usage user defined tag. Though construction of XML tin hold out standardize yesteryear making usage of DTD together with XML Schema. XML is by together with large used to transfer information from ane organization to closed to other e.g. betwixt customer together with server inward corporation applications.

Question 2: Difference betwixt DTD together with XML Schema?

Answer : There are duo of differences betwixt DTD together with XML Schema e.g. DTD is non written using XML piece XML schema are xml documents inward itself, which agency existing XML tools similar XML parsers tin be used to piece of job amongst XML schema. Also XML schema is designed after DTD together with it offering to a greater extent than types to map dissimilar types of information inward XML documents. On the other paw DTD stands for Document Type Definition together with was a legacy way to define construction of XML documents.

Question 3: What is XPath ?

Answer : XPath is an XML technology scientific discipline which is used to shout out upwards chemical component from XML documents. Since XML documents are structured, XPath aspect tin hold out used to locate together with shout out upwards elements, attributes or value from XML files. XPath is similar to SQL inward price of retrieving information from XML but it has it's ain syntax together with rules. See hither to know to a greater extent than almost How to usage XPath to shout out upwards information from XML documents.

Question 4: What is XSLT?

Answer : XSLT is closed to other pop XML technology scientific discipline to transform ane XML file to other XML, HTML or whatever other format. XSLT is similar a linguistic communication which specifies its ain syntax, functions together with operator to transform XML documents. Usually transformation is done yesteryear XSLT Engine which reads teaching written using XSLT syntax inward XML manner sheets or XSL files. XSLT also makes extensive usage of recursion to perform transformation. One of the pop event of using XSLT is for displaying information acquaint inward XML files as HTML pages. XSLT is also rattling handy to transforming ane XML file into closed to other XML document.

Question 5: What is chemical component together with attribute inward XML?

Answer : This tin hold out best explained yesteryear an example. let's run across a uncomplicated XML snippet

<Orders>
  <Order id="123">
     <Symbol> 6758.T</Symbol>
     <Price> 2300</Price>
  <Order>
<Orders>

In this sample XML id is an attribute of <Order> element. Here <Symbol>, <Price> together with <Orders> are also other elements but they don't bring whatever attribute.

Question 6: What is pregnant of good formed XML ?

Answer : Another interesting XML interview question which most appeared inward telephonic interviews. Influenza A virus subtype H5N1 good formed XML agency an XML document which is syntactically correct e.g. it has a rootage element, all opened upwards tags are closed properly, attributes are inward quotes etc.  If an XML is non good formed, it may non hold out processed together with parsed correctly yesteryear diverse XML parsers.

Question 7: What is XML namespace? Why it's important?

Answer : XML namespace are similar to package inward Java together with used to furnish a way to avoid conflict betwixt 2 xml tags of same get upwards but dissimilar sources. XML namespace is defined using xmlns attribute at move yesteryear of the XML document together with has next syntax  xmlns:prefix="URI". afterward that prefix is used along amongst actual tag inward XML documents. Here is an event of using XML namespace :

<root xmlns:inst="http://instruments.com/inst"
  <inst:phone>
      <inst:number>837363223</inst:number>
   </inst:phone>
</root>

Question 8: Difference betwixt DOM together with SAX parser ?

Answer : This is closed to other rattling pop XML interview question, non simply inward XML basis but also on Java world. Main divergence betwixt DOM together with SAX parser is the way they parse XML documents. DOM creates an inward retentiveness tree representation of XML documents during parsing piece SAX is a event driven parser. See Difference betwixt DOM together with SAX parser for to a greater extent than detailed reply of this question.

Question 9: What is a CDATA department inward XML?

Answer : I similar this XML Interview questions for its simplicity together with importance, withal many programmer doesn't know much almost it. CDATA stands for graphic symbol information together with has particular teaching for XML parsers. Since XML parser parse all text inward XML document e.g. <name>This is get upwards of person</name>  here fifty-fifty though value of tag <name> volition hold out parsed because it may incorporate XML tags e.g. <name><firstname>First Name</firstname></name>. CDATA department is non parsed yesteryear XML parser. CDATA department starts amongst "<![CDATA[" together with finishes amongst "]]>".

Question 10: What is XML information Binding inward Java?

Answer : XML binding inward Java refers to creating Java classes together with object from XML documents together with then modifying XML documents using Java programming language. JAXB , Java API for XML binding provides convenient way to bind XML documents amongst Java objects. Other alternatives for XML binding is using opened upwards source library e.g. XML Beans. One of the biggest payoff of XML binding inward Java is to leverage Java programming capability to create together with modify XML documents.

This listing of XML Interview questions together with answers are collected from programmers but useful to anyone who is working inward XML technologies. Important of XML technologies similar XPath, XSLT, XQuery is alone going to increase because of platform independent nature of XML together with it's popularity of transmitting information over cross platform. Though XML has disadvantage similar verbosity together with size but its highly useful inward spider web services together with transmitting information from ane organization to other where bandwidth together with speed is of secondary concern.

Further Learning
Java In-Depth: Become a Complete Java Engineer!
Master Java Web Services together with REST API amongst Spring Boot
Java Web Fundamentals

Share this post