J2EE Interview questions for 2008 preparation

J2EE Interview questions

J2EE Interview questions and answers

31. 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.


32.What is business method?


A method of an enterprise bean that implements the

business logic or rules of an application.


33. What is callback methods


Component methods called by the container to notify

the component of important events in its life cycle.


34. What is caller


Same as caller principal.


35. What is caller principal


The principal that identifies the invoker of the

enterprise bean method.


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.


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.


38. What is certificate authority?


A trusted organization that issues public key

certificates and provides identification to the



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.


40. What is comment?


In an XML document, text that is ignored unless the

parser is specifically told to recognize it.

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