| 1. What is J2EE? |
| Description: J2EE Stands for Java 2 Enterprise Edition. J2EE is an environment for developing and deploying enterprise applications. J2EE specification is defined by Sun Microsystems Inc. now acquired by Oracle. |
| 2. What do you understand by a J2EE module? |
| Description: A J2EE module is a software unit that consists of one or more J2EE components of the same container type along with one deployment descriptor of that type. J2EE specification defines four types of modules |
| 3. Tell me something about J2EE component? |
| Description: A J2EE module is a software unit that consists of one or more J2EE components of the same container type along with one deployment descriptor of that type. J2EE specification defines four types of modules |
| 4. What are the contents of web module? |
| Description: A J2EE module is a software unit that consists of one or more J2EE components of the same container type along with one deployment descriptor of that type. J2EE specification defines four types of modules |
| 5. Differentiate between .ear, .jar and .war files. |
| Description: Answer: These files are simply zipped file using java jar tool. These files are created for different purposes. Here is the description of these files: |
| 6. What is the difference between Session Bean and Entity Bean? |
| Description: Session Bean: Session is one of the EJBs and it represents a single client inside the Application Server. Stateless session is easy to develop and its efficient. As compare to entity beans session beans require few server resources. |
| 7. Why J2EE is suitable for the development distributed multi-tiered enterprise applications? |
| Description: Answer: The J2EE platform consists of multi-tiered distributed application model. J2EE applications allows the developers to design and implement the business logic into components according to business requirement. J2EE architecture allows the development of multi-tired applications and the developed applications can be installed on different machines depending on the tier in the multi-tiered J2EE environment . The J2EE application parts are: |
| 8. What do you understand by a container? |
| Description: Normally, thin-client multi-tiered applications are hard to write because they involve many lines of intricate code to handle transaction and state management, multithreading, resource pooling, and other complex low-level details. The component-based and platform-independent J2EE architecture makes J2EE applications easy to write because |
| 9. What are the services provided by a container? |
| Description: Answer: The services provided by container are as follows: |
| 10. What are types of J2EE clients? |
| Description: J2EE clients are the software that access the services components installed on the J2EE container. Following are the J2EE clients: |
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