J2EE Interview questions and answers

151. What is JavaServer Pages Standard Tag Library
(JSTL) 

A tag library that encapsulates core functionality
common to many JSP applications. JSTL has support for
common, structural tasks such as iteration and
conditionals, tags for manipulating XML documents,
internationalization and locale-specific formatting
tags, SQL tags, and functions. 

152. What is JAXR client 

A client program that uses the JAXR API to access a
business registry via a JAXR provider. 




153. What is JAXR provider 

An implementation of the JAXR API that provides access
to a specific registry provider or to a class of
registry providers that are based on a common
specification. 

154. What is JDBC 

An JDBC for database-independent connectivity between
the J2EE platform and a wide range of data sources. 


155. What is JMS 

Java Message Service. 

156. What is JMS administered object 

A preconfigured JMS object (a resource manager
connection factory or a destination) created by an
administrator for the use of JMS clients and placed in
a JNDI namespace

157. What is JMS application 

One or more JMS clients that exchange messages. 


158. What is JMS client 

A Java language program that sends or receives
messages. 

159. What is JMS provider 

A messaging system that implements the Java Message
Service as well as other administrative and control
functionality needed in a full-featured messaging
product. 

160. What is JMS session 

A single-threaded context for sending and receiving
JMS messages. A JMS session can be nontransacted,
locally transacted, or participating in a distributed
transaction.