Core Java J2EE Interview Questions and Answers Pdf - 4

Question: 16

What is prolog?

The part of an XML document that precedes the XML data. The prolog includes the declaration and an optional DTD.

Question: 17

What is Publish/subscribe messaging system?

A messaging system in which clients address messages to a specific node in a content hierarchy, called a topic. Publishers and subscribers are generally anonymous and can dynamically publish or subscribe to the content hierarchy. The system takes care of distributing the message arriving from a node’s multiple publishers to its multiple subscribes.

Question: 18

What is template?

A set of formatting instructions that apply to the nodes selected by an XPath expression.

Question: 19

What is destination?

A JMS administered object that encapsulates the identity of a JMS queue or topic. See point to point messaging system, publish/subscribe messaging system.

Question: 20

What is container managed transaction?

A transaction whose boundaries are defined by an EJB container. An entity bean must use container managed transactions.