Java J2EE Question and Answers

25. What does web module contains?
  The web module contains
  • JSP files
  • class files for servlets
  • GIF and HTML files and
  • a Web deployment descriptor
  • Web modules are packaged as JAR files with a .war (Web Archive) extension.
 
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26. What is Java Transaction Services (JTS)?
  Specifies the implementation of a transaction manager that supports JTA and implements the Java mapping of the Object Management Group Object Transaction Service 1.1 specification at the level below the API.
 
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27. What is URN?
 
  • Uniform resource name.
  • A unique identifier that identifies an entity but doesn't tell where it is located.
  • A system can use a URN to lookup an entity locally before trying to find it on the Web. It also allows the web location to change, while still allowing the entity to be found.
 
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28. What is Web server provider?
  A vendor that supplies a web server.
 
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