Java Archives - Quiz - Explanation

The correct answers are indicated below, along with text that explains the correct answers.

1.	The primary purpose of JAR files in relation to JavaBeans is to:
	A.	Provide a means of compressing Bean resources.
	B.	Serve as a standard format for distributing Beans.
	C.	Support digital signatures.
	The correct answer is B. JAR files are important to JavaBeans because they serve as a standard format for distributing Beans. A is incorrect because even though compression can be useful for Beans that are published on the Web, the primary importance of JAR files is as a distribution format for Beans. C is incorrect for similar reasons since digital signatures can be useful for Beans with security concerns.

2.	What informational file is required for a JAR file to adequately house a Bean?
	A.	A header file.
	B.	A make file.
	C.	A manifest file.
	The correct answer is C. A manifest file is the informational file required for a JAR file to adequately house a Bean. A and B are incorrect because header files and make files have nothing to do with packaging Beans in JAR files; header files are used to define classes in programming languages such as C++, while make files are used to outline build information for some compilers.