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


bearer.


 



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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