Solaris Developer Quiz March 21, 2007

Lippman

Which of the following is an XML reference file?
a) .jar file
b) .class file
c) .app bundle
d) .jnlp file

The correct answer is d.

A '.jnlp' file is an XML file that references jar files (often remote) to run a particular application.

'Jar' stands for Java Archive. A '.jar' file contains a  file format based on the popular ZIP file format and is used for aggregating many files into one. Although Jar can be used as a general archiving tool, the primary motivation for its development was so that Java applets and their requisite components (.class files, images and sounds) can be downloaded to a browser in a single HTTP transaction, rather than opening a new connection for each piece.

A '.class' file is the result of the the Java programming language compiler (javac) translating your source file code into instructions that the Java virtual machine can understand. The instructions contained within a .class file are known as bytecodes.

An '.app' bundle is a directory that contains descriptors, resources, dependencies and such for (typically) a self contained application environment.


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