J2EE Interview questions and answers

21. 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. 


22. What is authorization constraint 

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

23. What is B2B 

B2B stands for Business-to-business. 

24. 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. 

25. 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. 


26. 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. 

27. What is bean-managed transaction 

A transaction whose boundaries are defined by an
enterprise bean. 


28. What is binding (XML) 

Generating the code needed to process a well-defined
portion of XML data. 

29. What is binding (JavaServer Faces technology) 

Wiring UI components to back-end data sources such as
backing bean properties. 

30. 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.