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j2ee Q&A part 23
Posted Date: 20 Mar 2008 Resource Type: Articles/Knowledge Sharing Category: Placement Papers
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Posted By: ramya Member Level: Gold
Rating:  Points: 5
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251. What is renderer
A Java class that can render the output for a set of
JavaServer Faces UI components.
252. What is request-response messaging
A method of messaging that includes blocking until a
response is received.
253. What is resource adapter
A system-level software driver that is used by an EJB
container or an application client to connect to an
enterprise information system. A resource adapter
typically is specific to an enterprise information
system. It is available as a library and is used
within the address space of the server or client using
it. A resource adapter plugs in to a container. The
application components deployed on the container then
use the client API (exposed by the adapter) or
tool-generated high-level abstractions to access the
underlying enterprise information system. The resource
adapter and EJB container collaborate to provide the
underlying mechanisms-transactions, security, and
connection pooling-for connectivity to the enterprise
information system.
254. What is resource adapter module
A deployable unit that contains all Java interfaces,
classes, and native libraries, implementing a resource
adapter along with the resource adapter deployment
descriptor.
255. What is resource manager
Provides access to a set of shared resources. A
resource manager participates in transactions that are
externally controlled and coordinated by a transaction
manager. A resource manager typically is in a
different address space or on a different machine from
the clients that access it. Note: An enterprise
information system is referred to as a resource
manager when it is mentioned in the context of
resource and transaction management.
256. What is resource manager connection
An object that represents a session with a resource
manager.
257. What is resource manager connection factory
An object used for creating a resource manager
connection.
258. What is RMI
Remote Method Invocation. A technology that allows an
object running in one Java virtual machine to invoke
methods on an object running in a different Java
virtual machine.
259. What is RMI-IIOP
A version of RMI implemented to use the CORBA IIOP
protocol. RMI over IIOP provides interoperability with
CORBA objects implemented in any language if all the
remote interfaces are originally defined as RMI
interfaces.
260. What is role (development)
The function performed by a party in the development
and deployment phases of an application developed
using J2EE technology. The roles are application
component provider, application assembler, deployer,
J2EE product provider, EJB container provider, EJB
server provider, Web container provider, Web server
provider, tool provider, and system administrator.
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