Differences Between War and Ear | Weblogic Interview Questions

Question: Differences Between War and Ear?

Answer: In J2EE, application modules are packaged as EAR, JAR,

and WAR based on their functionality. (Differences Between War and Ear)

Each type of file (.jar, .war, .ear) is processed uniquely by application servers, servlet containers, EJB containers, etc

WAR:

Web modules which contain Servlet class files, JSP Files, supporting files, GIF and HTML files are packaged as a JAR file with .war( web archive) extension

War files (files with a .war extension) are intended to contain complete Web applications. (Company)In this context, a Web application is defined as a single group of files, classes, resources, .jar files that can be packaged and accessed as one servlet context.

EAR:

All the above files(.jar and .war) are packaged as a JAR files with .ear ( enterprise archive) extension and deployed into Application Server.

Ear files (files with a .ear extension) are intended to contain complete enterprise applications. In this context, an enterprise application is defined as a collection of .jar files, resources, classes, and multiple Web application. 

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