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J2EE Interview Questions and Answers

Ques 6. Are JavaBeans J2EE components?

Ans. No. JavaBeans components are not considered J2EE components by the J2EE specification. They are written to manage the data flow between an application client or applet and components running on the J2EE server or between server components and a database. JavaBeans components written for the J2EE platform have instance variables and get and set methods for accessing the data in the instance variables. JavaBeans components used in this way are typically simple in design and implementation, but should conform to the naming and design conventions outlined in the JavaBeans component architecture.

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Ques 7. Is HTML page a web component?
Ans. No. Static HTML pages and applets are bundled with web components during application assembly, but are not considered web components by the J2EE specification. Even the server-side utility classes are not considered web components, either.
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Ques 8. What can be considered as a web component?
Ans. J2EE Web components can be either servlets or JSP pages. Servlets are Java programming language classes that dynamically process requests and construct responses. JSP pages are text-based documents that execute as servlets but allow a more natural approach to creating static content.
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Ques 9. What is the container?
Ans. Containers are the interface between a component and the low-level platform specific functionality that supports the component. Before a Web, enterprise bean, or application client component can be executed, it must be assembled into a J2EE application and deployed into its container.
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Ques 10. What are container services?
Ans. A container is a runtime support of a system-level entity. Containers provide components with services such as lifecycle management, security, deployment, and threading.
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