Rep) Java 2 Platform, Enterprise Edition.

Q)   What is J2EE application

Rep) Any deployable unit of J2EE functionality. This can be
a single J2EE module or a group of modules packaged
into an EAR file along with a J2EE application
deployment descriptor. J2EE applications are typically
engineered to be distributed across multiple computing
tiers.

Q)  What is J2EE component

Rep) A self-contained functional software unit supported by
a container and configurable at deployment time. The
J2EE specification defines the following J2EE
components: Application clients and applets are
components that run on the client. Java servlet and
JavaServer Pages (JSP) technology components are Web
components that run on the server. Enterprise
JavaBeans (EJB) components (enterprise beans) are
business components that run on the server. J2EE
components are written in the Java programming
language and are compiled in the same way as any
program in the language. The difference between J2EE
components and “standard” Java classes is that J2EE
components are assembled into a J2EE application,
verified to be well formed and in compliance with the
J2EE specification, and deployed to production, where
they are run and managed by the J2EE server or client
container.

Q)  What is J2EE module

Rep) A software unit that consists of one or more J2EE
components of the same container type and one
deployment descriptor of that type. There are four
types of modules: EJB, Web, application client, and
resource adapter. Modules can be deployed as
stand-alone units or can be assembled into a J2EE
application.

Q)  What is J2EE product

Rep) An implementation that conforms to the J2EE platform
specification.

Q)   What is J2EE product provider

Rep) A vendor that supplies a J2EE product.

Q)  What is J2EE server

Rep) The runtime portion of a J2EE product. A J2EE server
provides EJB or Web containers or both.

Q)   What is J2ME

Rep) Abbreviate of Java 2 Platform, Micro Edition.

Q)  What is J2SE

Rep) Abbreviate of Java 2 Platform, Standard Edition.

Q)  What is JAR

Rep) Java archive. A platform-independent file format that
permits many files to be aggregated into one file.

Q)   What is Java 2 Platform, Enterprise Edition(J2EE)

Rep) An environment for developing and deploying enterprise
applications. The J2EE platform consists of a set of
services, application programming interfaces (APIs),
and protocols that provide the functionality for
developing multitiered, Web-based applications.

Q)  What is Java 2 Platform, Micro Edition (J2ME)

Rep) A highly optimized Java runtime environment targeting
a wide range of consumer products, including pagers,
cellular phones, screen phones, digital set-top boxes,
and car navigation systems.

Q)  What is Java 2 Platform, Standard Edition (J2SE)

Rep) The core Java technology platform.

Q)  What is Java API for XML Processing (JAXP)

Rep) An API for processing XML documents. JAXP leverages
the parser standards SAX and DOM so that you can
choose to parse your data as a stream of events or to
build a tree-structured representation of it. JAXP
supports the XSLT standard, giving you control over
the presentation of the data and enabling you to
convert the data to other XML documents or to other
formats, such as HTML. JAXP provides namespace
support, allowing you to work with schema that might
otherwise have naming conflicts.

Q)  What is Java API for XML Registries (JAXR)

Rep) An API for accessing various kinds of XML registries.

Q)  What is Java API for XML-based RPC (JAX-RPC)

Rep) An API for building Web services and clients that use
remote procedure calls and XML

Q)   What is Java IDL

Rep) A technology that provides CORBA interoperability and
connectivity capabilities for the J2EE platform. These
capabilities enable J2EE applications to invoke
operations on remote network services using the Object
Management Group IDL and IIOP.

Q)  What is Java Message Service (JMS)

Rep) An API for invoking operations on enterprise messaging
systems.

Q)  What is Java Naming and Directory Interface (JNDI)

Rep) An API that provides naming and directory
functionality.

Q)   What is Java Secure Socket Extension (JSSE)

Rep) A set of packages that enable secure Internet
communications.

Q)   What is Java Transaction API (JTA)

Rep) An API that allows applications and J2EE servers to
access transactions.

Q)  What is Java Transaction Service (JTS)

Rep) 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.

Q)  What is JavaBeans component

Rep) A Java class that can be manipulated by tools and
composed into applications. A JavaBeans component must
adhere to certain property and event interface
conventions.

Q)  What is JavaMail

Rep) An API for sending and receiving email.

Q)   What is JavaServer Faces Technology

Rep) A framework for building server-side user interfaces
for Web applications written in the Java programming
language.

Q)  What is JavaServer Faces conversion model

Rep) A mechanism for converting between string-based markup
generated by JavaServer Faces UI components and
server-side Java objects.

Q)  What is JavaServer Faces event and listener model

Rep) A mechanism for determining how events emitted by
JavaServer Faces UI components are handled. This model
is based on the JavaBeans component event and listener
model.

Q)  What is JavaServer Faces _expression language

Rep) A simple _expression language used by a JavaServer
Faces UI component tag attributes to bind the
associated component to a bean property or to bind the
associated component’s value to a method or an
external data source, such as a bean property. Unlike
JSP EL expressions, JavaServer Faces EL expressions
are evaluated by the JavaServer Faces implementation
rather than by the Web container.

Q)  What is JavaServer Faces navigation model

Rep) A mechanism for defining the sequence in which pages
in a JavaServer Faces application are displayed.

Q)  What is JavaServer Faces UI component

Rep) A user interface control that outputs data to a client
or allows a user to input data to a JavaServer Faces
application.

Q)  What is JavaServer Faces UI component class

Rep) A JavaServer Faces class that defines the behavior and
properties of a JavaServer Faces UI component.

Q)  What is JavaServer Faces validation model

Rep) A mechanism for validating the data a user inputs to a
JavaServer Faces UI component.

Q)  What is JavaServer Pages (JSP)

Rep) An extensible Web technology that uses static data,
JSP elements, and server-side Java objects to generate
dynamic content for a client. Typically the static
data is HTML or XML elements, and in many cases the
client is a Web browser.

Q)  What is JavaServer Pages Standard Tag Library(JSTL)

Rep) 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.

Q)  What is JAXR client

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

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Rep) Compatibility test suite. A suite of compatibility
tests for verifying that a J2EE product complies with
the J2EE platform specification.

Q) What is data

Rep) The contents of an element in an XML stream, generally
used when the element does not contain any
subelements. When it does, the term content is
generally used. When the only text in an XML structure
is contained in simple elements and when elements that
have subelements have little or no data mixed in, then
that structure is often thought of as XML data, as
opposed to an XML document.

Q) What is DDP

Rep) Document-driven programming. The use of XML to define
applications.

Q) What is declaration

Rep) The very first thing in an XML document, which
declares it as XML. The minimal declaration is . The
declaration is part of the document prolog.

Q) What is declarative security

Rep)Mechanisms used in an application that are expressed
in a declarative syntax in a deployment descriptor.

Q) What is delegation

Rep) An act whereby one principal authorizes another
principal to use its identity or privileges with some
restrictions.

Q) What is deployer

Rep) A person who installs J2EE modules and applications
into an operational environment.

Q) What is deployment

Rep) The process whereby software is installed into an
operational environment.

Q) What is deployment descriptor

Rep) An XML file provided with each module and J2EE
application that describes how they should be
deployed. The deployment descriptor directs a
deployment tool to deploy a module or application with
specific container options and describes specific
configuration requirements that a deployer must
resolve.

Q) What is destination

Rep) A JMS administered object that encapsulates the
identity of a JMS queue or topic. See point-to-point
messaging system, publish/subscribe messaging system.
68. What is digest authentication

An authentication mechanism in which a Web application
authenticates itself to a Web server by sending the
server a message digest along with its HTTP request
message. The digest is computed by employing a one-way
hash algorithm to a concatenation of the HTTP request
message and the client’s password. The digest is
typically much smaller than the HTTP request and
doesn’t contain the password.

Q) What is distributed application

Rep) An application made up of distinct components running
in separate runtime environments, usually on different
platforms connected via a network. Typical distributed
applications are two-tier (client-server), three-tier
(client-middleware-server), and multitier
(client-multiple middleware-multiple servers).

Q) What is document

Rep) In general, an XML structure in which one or more
elements contains text intermixed with subelements.

Q) What is Document Object Model

Rep) An API for accessing and manipulating XML documents as
tree structures. DOM provides platform-neutral,
language-neutral interfaces that enables programs and
scripts to dynamically access and modify content and
structure in XML documents.

Q) What is document root

Rep) The top-level directory of a WAR. The document root is
where JSP pages, client-side classes and archives, and
static Web resources are stored.

Q) What is DTD

Rep)Document type definition. An optional part of the XML
document prolog, as specified by the XML standard. The
DTD specifies constraints on the valid tags and tag
sequences that can be in the document. The DTD has a
number of shortcomings, however, and this has led to
various schema proposals. For example, the DTD entry
says that the XML element called username contains
parsed character data-that is, text alone, with no
other structural elements under it. The DTD includes
both the local subset, defined in the current file,
and the external subset, which consists of the
definitions contained in external DTD files that are
referenced in the local subset using a parameter
entity.

Q) What is durable subscription

Rep)In a JMS publish/subscribe messaging system, a
subscription that continues to exist whether or not
there is a current active subscriber object. If there
is no active subscriber, the JMS provider retains the
subscription’s messages until they are received by the
subscription or until they expire.

Q) What is ebXML

Rep)Electronic Business XML. A group of specifications
designed to enable enterprises to conduct business
through the exchange of XML-based messages. It is
sponsored by OASIS and the United Nations Centre for
the Facilitation of Procedures and Practices in
Administration, Commerce and Transport (U.N./CEFACT).

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Rep) The process that verifies the identity of a user,
device, or other entity in a computer system, usually
as a prerequisite to allowing access to resources in a
system. The Java servlet specification requires three
types of authentication-basic, form-based, and
mutual-and supports digest authentication.

Q) What is authorization?

Rep) The process by which access to a method or resource is
determined. Authorization depends on the determination
of whether the principal associated with a request
through authentication is in a given security role. A
security role is a logical grouping of users defined
by the person who assembles the application. A
deployer maps security roles to security identities.
Security identities may be principals or groups in the
operational environment.

Q) What is authorization constraint

Rep) An authorization rule that determines who is permitted
to access a Web resource collection.

Q) What is B2B

Rep) B2B stands for Business-to-business.

Q) What is backing bean

Rep) A JavaBeans component that corresponds to a JSP page
that includes JavaServer Faces components. The backing
bean defines properties for the components on the page
and methods that perform processing for the component.
This processing includes event handling, validation,
and processing associated with navigation.

Q) What is basic authentication

Rep) An authentication mechanism in which a Web server
authenticates an entity via a user name and password
obtained using the Web application’s built-in
authentication mechanism.

Q) What is business logic

Rep) The code that implements the functionality of an
application. In the Enterprise JavaBeans architecture,
this logic is implemented by the methods of an
enterprise bean.

Q) What is business method

Rep) A method of an enterprise bean that implements the
business logic or rules of an application.

Q) What is callback methods

Rep) Component methods called by the container to notify
the component of important events in its life cycle.

Q) What is caller

Rep) Same as caller principal.

Q) What is caller principal

Rep) The principal that identifies the invoker of the
enterprise bean method.

Q) What is cascade delete

Rep) A deletion that triggers another deletion. A cascade
delete can be specified for an entity bean that has
container-managed persistence.

Q) What is CDATA

Rep) A predefined XML tag for character data that means
“don’t interpret these characters,” as opposed to
parsed character data (PCDATA), in which the normal
rules of XML syntax apply. CDATA sections are
typically used to show examples of XML syntax.

Q) What is certificate authority

Rep) A trusted organization that issues public key
certificates and provides identification to the
bearer.

Q) What is client-certificate authentication

Rep) An authentication mechanism that uses HTTP over SSL,
in which the server and, optionally, the client
authenticate each other with a public key certificate
that conforms to a standard that is defined by X.509
Public Key Infrastructure.

Q) What is comment

Rep) In an XML document, text that is ignored unless the
parser is specifically told to recognize it.

Q) What is commit

Rep) The point in a transaction when all updates to any
resources involved in the transaction are made
permanent.

Q) What is component contract

Rep) The contract between a J2EE component and its
container. The contract includes life-cycle management
of the component, a context interface that the
instance uses to obtain various information and
services from its container, and a list of services
that every container must provide for its components.

Q) What is component-managed sign-on

Rep) A mechanism whereby security information needed for
signing on to a resource is provided by an application
component.

Q) What is connector

Rep) A standard extension mechanism for containers that
provides connectivity to enterprise information
systems. A connector is specific to an enterprise
information system and consists of a resource adapter
and application development tools for enterprise
information system connectivity. The resource adapter
is plugged in to a container through its support for
system-level contracts defined in the Connector
architecture.

Q) What is Connector architecture

Rep) An architecture for integration of J2EE products with
enterprise information systems. There are two parts to
this architecture: a resource adapter provided by an
enterprise information system vendor and the J2EE
product that allows this resource adapter to plug in.
This architecture defines a set of contracts that a
resource adapter must support to plug in to a J2EE
product-for example, transactions, security, and
resource management.

Q) What is context attribute

Rep) An object bound into the context associated with a
servlet.

Q) What is context root

Rep) A name that gets mapped to the document root of a Web
application.

Q) What is conversational state ?

Rep) The field values of a session bean plus the transitive
closure of the objects reachable from the bean’s
fields. The transitive closure of a bean is defined in
terms of the serialization protocol for the Java
programming language, that is, the fields that would
be stored by serializing the bean instance.

Q) What is CORBA

Rep) Common Object Request Broker Architecture. A
language-independent distributed object model
specified by the OMG.

Q) What is create method

Rep) A method defined in the home interface and invoked by
a client to create an enterprise bean.

Q) What is credentials

Rep) The information describing the security attributes of
a principal.

Q) What is CSS

Rep) Cascading style sheet. A stylesheet used with HTML and
XML documents to add a style to all elements marked
with a particular tag, for the direction of browsers
or other presentation mechanisms.

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Rep) J2EE is an environment for developing and deploying enterprise applications. The J2EE platform consists of a set of services, application programming interfaces (APIs), and protocols that provide the functionality for developing multitiered, web-based applications.

Q) What is the J2EE module?

Rep) A J2EE module consists of one or more J2EE components for the same container type and one component deployment descriptor of that type.

Q) What are the components of J2EE application?

Rep) J2EE component is a self-contained functional software unit that is assembled into a J2EE application with its related classes and files and communicates with other components. The J2EE specification defines the following J2EE components: Application clients and applets are client components. Java Servlet and JavaServer PagesTM (JSPTM) technology components are web components. Enterprise JavaBeansTM (EJBTM) components (enterprise beans) are business components. Resource adapter components provided by EIS and tool vendors.

Q)What are the four types of J2EE modules?

Rep)
1. Application client module
2. Web module
3. Enterprise JavaBeans module
4. Resource adapter module

Q) What does application client module contain?

Rep) The application client module contains:

–class files,
–an application client deployment descriptoor. Application client modules are packaged as JAR files with a .jar extension.

Q) What is “application assembler” ?

Rep) A person who combines J2EE components and modules into deployable application units.

Q) What is “application client” ?

Rep) A first-tier J2EE client component that executes in its own Java virtual machine. Application clients have access to some J2EE platform APIs.

Q) What is “application client container” ?

Rep) A container that supports application client components.

Q) What is “application client module” ?

Rep) A software unit that consists of one or more classes and an application client deployment descriptor.

Q) What is “application component provider” ?

Rep) A vendor that provides the Java classes that implement components’ methods, JSP page definitions, and any required deployment descriptors.

Q) What is “application configuration resource file” ?

Rep)An XML file used to configure resources for a JavaServer Faces application, to define navigationrules for the application, and to register converters,validators, listeners, renderers, and components with the application.

Q) What is “archiving”

Rep) The process of saving the state of an object and
restoring it.

Q) What is “asant” ?

ReP) A Java-based build tool that can be extended using Java classes. The configuration files are XML-based,calling out a target tree where various tasks get executed.

Q) What is “attribute” What is “asant” ?

Rep) A qualifier on an XML tag that provides additional information. with the application.

Q) What is “archiving” ?

Rep)The process of saving the state of an object and
restoring it.

Q) What is “asant”

Rep) A Java-based build tool that can be extended using Java classes. The configuration files are XML-based,calling out a target tree where various tasks get executed.

Q) What is “attribute”What is “asant” ?

Rep) A qualifier on an XML tag that provides additional information.

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