a question on namespaces in jsp

[Rama Krishna]

<%@ page import="java.util.*" %>
<jsp: import import = "java.util.*" />
<jsp:directive.page import ="java.util.*" />
<jsp: page import = "java.util.*" />

Assuming the prefix "jsp" has been mapped to the namespace
http://java.sun.com/JSP/Page, which of the following are true and why?

Could someone please help me understand the question (namespace?) and possibly the answers pleaase?