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Computer Interview Questions Answers

J2EE Interview Questions Answers

Question - 1 : - What is backing bean ?

Answer - 1 : - 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.

Question - 2 : - What is component contract ?

Answer - 2 : - 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.

Question - 3 : - What is EJB object ?

Answer - 3 : - An object whose class implements the enterprise bean's remote interface. A client never references an enterprise bean instance directly; a client always references an EJB object. The class of an EJB object is generated by a container's deployment tools.

Question - 4 : - What is basic authentication ?

Answer - 4 : - 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.

Question - 5 : - What is "attribute"?  

Answer - 5 : - A qualifier on an XML tag that provides additional information.

Question - 6 : - What is "application client" ?  

Answer - 6 : - A first-tier J2EE client component that executes in its own Java virtual machine. Application clients have access to some J2EE platform APIs.

Question - 7 : - What is HTTP ?

Answer - 7 : - Hypertext Transfer Protocol. The Internet protocol used to retrieve hypertext objects from remote hosts. HTTP messages consist of requests from client to server and responses from server to client.

Question - 8 : - What is ISV ?  

Answer - 8 : - Independent software vendor.  

Question - 9 : - What is Enterprise JavaBeans (EJB) ?

Answer - 9 : - A component architecture for the development and deployment of object-oriented, distributed, enterprise-level applications. Applications written using the Enterprise JavaBeans architecture are scalable, transactional, and secure.

Question - 10 : - What is cascade delete ?  

Answer - 10 : - 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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