J2EE Interview Questions

What is "abstract schema"
The part of an entity bean's deployment descriptor that defines the bean's persistent fields and relationships.

What is "abstract schema name"
A logical name that is referenced in EJB QL queries.

What is "access control"
The methods by which interactions with resources are limited to collections of users or programs for the purpose of enforcing
integrity, confidentiality, or availability constraints.

What is "ACID"
The acronym for the four properties guaranteed by transactions: atomicity, consistency, isolation, and durability.

What is "activation"
The process of transferring an enterprise bean from secondary storage to memory. (See passivation.) What is "anonymous access"
Accessing a resource without authentication.

What is "applet"
A J2EE component that typically executes in a Web browser but can execute in a variety of other applications or devices that
support the applet programming model.

What is "applet container"
A container that includes support for the applet programming model.

What is "application assembler"
A person who combines J2EE components and modules into deployable application units.

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

What is "application client container"
A container that supports application client components. What is "application client module"
A software unit that consists of one or more classes and an application client deployment descriptor.

What is "application component provider"
A vendor that provides the Java classes that implement components' methods, JSP page definitions, and any required deployment
descriptors.

What is "application configuration resource file"
An XML file used to configure resources for a JavaServer Faces application, to define navigation rules for the application,
and to register converters, validators, listeners, renderers, and components with the application.

What is "archiving"
The process of saving the state of an object and restoring it.

What is "asant"
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.

What is "attribute"
A qualifier on an XML tag that provides additional information.
What is authentication
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.

What is authorization
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.

What is authorization constraint
An authorization rule that determines who is permitted to access a Web resource collection.

What is B2B
B2B stands for Business-to-business.

What is backing bean
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. What is basic authentication
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.

What is bean-managed persistence
The mechanism whereby data transfer between an entity bean's variables and a resource manager is managed by the entity bean.

What is bean-managed transaction
A transaction whose boundaries are defined by an enterprise bean.

What is binary entity
See unparsed entity.

What is binding (XML)
Generating the code needed to process a well-defined portion of XML data.

What is binding (JavaServer Faces technology)
Wiring UI components to back-end data sources such as backing bean properties.
What is build file
The XML file that contains one or more asant targets. A target is a set of tasks you want to be executed. When starting
asant, you can select which targets you want to have executed. When no target is given, the project's default target is
executed.

What is business logic
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.

What is business method
A method of an enterprise bean that implements the business logic or rules of an application.

What is callback methods
Component methods called by the container to notify the component of important events in its life cycle.

What is caller
Same as caller principal.

What is caller principal
The principal that identifies the invoker of the enterprise bean method. What is cascade delete
A deletion that triggers another deletion. A cascade delete can be specified for an entity bean that has container-managed
persistence.

What is CDATA
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.

What is certificate authority
A trusted organization that issues public key certificates and provides identification to the bearer.

What is client-certificate authentication
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.

What is comment
In an XML document, text that is ignored unless the parser is specifically told to recognize it.
What is commit
The point in a transaction when all updates to any resources involved in the transaction are made permanent.

What is component
See what is J2EE component.

What is component (JavaServer Faces technology)
See what is JavaServer Faces UI component.

What is component contract
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.

What is component-managed sign-on
A mechanism whereby security information needed for signing on to a resource is provided by an application component.