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J2ee Interview Questions And Answers For Freshers Pdf

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What Is Enterprise Bean Provider? Answer : An application developer who produces enterprise bean classes, remote and home interfaces, and deployment descriptor files, and packages them in an EJB JAR file.


What Is Enterprise Information System? Answer : The applications that constitute an enterprise's existing system for handling companywide information.

These applications provide an information infrastructure for an enterprise. An enterprise information system offers a well-defined set of services to its clients. These services are exposed to clients as local or remote interfaces or both.

Examples of enterprise information systems include enterprise resource planning systems, mainframe transaction processing systems, and legacy database systems. Answer : An entity that provides enterprise information system-specific functionality to its clients.

Examples are a record or set of records in a database system, a business object in an enterprise resource planning system, and a transaction program in a transaction processing system. What Is Enterprise Javabeans ejb?

Answer : 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.

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Answer : Defines the queries for the finder and select methods of an entity bean having container-managed persistence. What Is An Entity?

Collection Framework. String Handling. Exception Handling.


IManages the execution of applets. Consists of a Web browser and Java Plugin running on the client together. It manages the execution of enterprise beans for J2EE application. Enterprise beans and their container run on the J2EE server. The framework events of a J2EE component's existence.

Each type of component has defining events that mark its transition into states in which it has varying availability for use. For example, servlet is created and has its init method called by its container before invocation of its service method by clients or other servlets that require its functionality.

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The init and destroy methods in this example are callback methods.Removal phase — The destroy function calls before servlet destruction. There is a check for duplicate records before inserting it.

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Filters differ from Web components in that they usually do not themselves create responses but rather modify or adapt the requests for a resource, and modify or adapt responses from a resource. Object Creation is the process to create the object in memory and returning its handler. These services are exposed to clients as local or remote interfaces or both. String Handling.

Servlet and JSP technology are web components. It does not allow duplicate values or null values. A client can serialize the handle and then later deserialize it to obtain a reference to the enterprise bean.

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