J2EE Interview Question and Answers
J2EE interview question and answers: J2EE is a platform used for developing enterprise-level applications using the Java programming language. It provides a comprehensive set of APIs for building web, enterprise, and distributed applications.
J2EE Interview Question and Answers: J2EE allows developers to create scalable, reliable, and secure applications that can run on a wide range of platforms. The J2EE platform consists of several components, including client-tier components, web-tier components, business-tier components, and enterprise information system (EIS) tier components. These components work together to create a robust and flexible environment for developing complex enterprise applications. J2EE is widely used in industries such as finance, healthcare, e-commerce, and more, where reliable and scalable enterprise applications are required. Here we are Providing Important J2EE Interview Question and Answers.
What is J2EE?
Answer: J2EE (Java 2 Platform, Enterprise Edition) is a platform for developing enterprise-level applications using the Java programming language.
What are the components of J2EE architecture?
Answer: J2EE architecture has four components: client-tier components, web-tier components, business-tier components, and enterprise information system (EIS) tier components.
What is the difference between J2EE and J2SE?
Answer: J2EE is a platform for developing enterprise-level applications while J2SE (Java 2 Platform, Standard Edition) is a platform for developing standalone desktop applications.
What is a Servlet?
Answer: A Servlet is a Java programming language class that extends the capabilities of a server. It is used to generate dynamic web content, respond to client requests, and interact with enterprise beans.
What is a JSP?
Answer: JSP (Java Server Pages) is a technology that enables the creation of dynamic, platform-independent web pages based on HTML, XML, or other document types.
What is an EJB?
Answer: EJB (Enterprise JavaBeans) is a server-side component architecture for building distributed, transactional, and secure business applications.
What is the difference between stateless and Stateful session beans?
Answer: A stateless session bean doesn’t maintain any state between method invocations while a stateful session bean maintains state between method invocations.
What is JPA?
Answer: JPA (Java Persistence API) is a Java programming language specification for managing relational data in Java applications.
What is a JDBC?
Answer: JDBC (Java Database Connectivity) is a Java programming language API that enables Java applications to interact with relational databases.
What is the difference between a container-managed transaction and a bean-managed transaction?
Answer: In a container-managed transaction, the container manages the transaction boundary while in a bean-managed transaction, the bean itself is responsible for managing the transaction boundary.
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