78. What is EJB home object

An object that provides the life-cycle operations(create, remove, find) for an enterprise bean. The class for the EJB home object is generated by the container's deployment tools. The EJB home object implements the enterprise bean's home interface. The client references an EJB home object to perform life-cycle operations on an EJB object. The client uses JNDI to locate an EJB home object

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77. What is EJB context

A vendor that supplies an EJB container. An objectthat allows an enterprise bean to invoke servicesprovided by the container and to obtain theinformation about the caller of a client-invokedmethod

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76. What is EJB container provider

A vendor that supplies an EJB container.

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75. What is EJB container

A container that implements the EJB component contract of the J2EE architecture. This contract specifies a runtime environment for enterprise beans that includes security, concurrency, life-cycle management, transactions, deployment, naming, and other services. An EJB container is provided by an EJB or J2EE server.

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74. What is EJB

EJB stands for Enterprise Java Bean and is a widely-adopted server side component architecture for J2EE. It enables rapid development of mission-critical application that are versatile, reusable and portable across middleware while protecting IT investment and preventing vendor lock-in.

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73. What is ebXML

Electronic Business XML. A group of specificationsdesigned to enable enterprises to conduct businessthrough the exchange of XML-based messages. It issponsored by OASIS and the United Nations Centre for the Facilitation of Procedures and Practices inAdministration, Commerce and Transport ( U.N./CEFACT).

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72. What is EAR file

Enterprise Archive file. A JAR archive that contains aJ2EE application.

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71. What is durable subscription

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.

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70. What is DTD

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.

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69. What is document root

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.

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68. What is Document Object Model

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.

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67. What is document

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

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69. What is distributed application

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).

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67. What is destination

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.

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66. What is deployment descriptor?

An XML file provided with each module and J2EEapplication 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.

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65. What is deployment

The process whereby software is installed into an operational environment.

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64. What is deplorer?

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

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63. What is delegation

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

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62. What is declarative security

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

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61. What is declaration

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.

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60. What is DDP

60. What is DDP
Document-driven programming. The use of XML to define applications.

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59. What is data

The contents of an element in an XML stream, generally used when the element does not contain any sub elements. 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 sub elements have little or no data mixed in, then
that structure is often thought of as XML data, as opposed to an XML document.

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58. What is CTS

Compatibility test suite? A suite of compatibility tests for verifying that a J2EE product complies with the J2EE platform specification.
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57. What is CSS

Cascading style sheet. A style sheet 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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56. What is credentials?

The information describing the security attributes of a principal.
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55. What is create method

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

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54. What is CORBA

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

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53. What is conversational state

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.

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52. What is context root

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

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51. What is context attribute

An object bound into the context associated with a servlet.
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45. What is Connector architecture

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.

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44. What is connector

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.

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43. What is component-managed sign-on

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

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42. 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.

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41. What is commit

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

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39. 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.

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38. What is certificate authority

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

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37. 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.

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36. 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.

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34. What is caller

Same as caller principal.

35. What is caller principal
The principal that identifies the invoker of the enterprise bean method.

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