Java J2EE Question and Answers

33. What is deployment descriptor?
 
  • An XML file provided with each module and J2EE application that describes how they should be deployed.
  • The deployment descriptor directs a deployment tool to deploy a module or application with specific container options and describes specific configuration requirements that a deployer must resolve.
 
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34. What is Java Transaction API (JTA)?
  An API that allows applications and J2EE servers to access transactions.
 
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35. What is XML Schema?
  The W3C specification for defining the structure, content and semantics of XML documents.
 
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36. What is WAR file?
 
  • Web application archive file.
  • A JAR archive that contains a Web module.
 
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