J2EE Interview questions and answers

201. What is normalization 

The process of removing redundancy by modularizing, as
with subroutines, and of removing superfluous
differences by reducing them to a common denominator.
For example, line endings from different systems are
normalized by reducing them to a single new line, and
multiple whitespace characters are normalized to one
space. 

202. What is North American Industry Classification
System (NAICS) 

A system for classifying business establishments based
on the processes they use to produce goods or
services. 


203. What is notation 

A mechanism for defining a data format for a non-XML
document referenced as an unparsed entity. This is a
holdover from SGML. A newer standard is to use MIME
data types and namespaces to prevent naming conflicts.


204. What is OASIS 

Organization for the Advancement of Structured
Information Standards. A consortium that drives the
development, convergence, and adoption of e-business
standards. 

205. What is OMG 

Object Management Group. A consortium that produces
and maintains computer industry specifications for
interoperable enterprise applications. 


206. What is one-way messaging 

A method of transmitting messages without having to
block until a response is received. 

207. What is ORB 

Object request broker. A library that enables CORBA
objects to locate and communicate with one another. 


208. What is OS principal 

A principal native to the operating system on which
the J2EE platform is executing. 

209. What is OTS 

Object Transaction Service. A definition of the
interfaces that permit CORBA objects to participate in
transactions. 

220. What is parameter entity 

An entity that consists of DTD specifications, as
distinct from a general entity. A parameter entity
defined in the DTD can then be referenced at other
points, thereby eliminating the need to recode the
definition at each location it is used.