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最新的 Java Technology 1Z0-858 免費考試真題:

1. Given:
1.<% int[] nums = {42,420,4200};
2.request.setAttribute("foo", nums); %>
3.${5 + 3 lt 6}
4.${requestScope['foo'][0] ne 10 div 0}
5.${10 div 0}
What is the result?

A) An exception is thrown.
B) true true Infinity
C) false true 0
D) false true Infinity
E) true true
F) Compilation or translation fails.
G) false true

2. You are building your own layout mechanism by including dynamic content for the page's header and footer sections. The footer is always static, but the header generates the <title> tag that requires the page name to be specified dynamically when the header is imported. Which JSP code snippet performs the import of the header content?

A) <jsp:import page='/WEB-INF/jsp/header.jsp'> <jsp:param name='pageName' value='Welcome Page' /> </jsp:import>
B) <jsp:import page='/WEB-INF/jsp/header.jsp'> <jsp:attribute name='pageName' value='Welcome Page' /> </jsp:import>
C) <jsp:include page='/WEB-INF/jsp/header.jsp'> <jsp:attribute name='pageName' value='Welcome Page' /> </jsp:include>
D) <jsp:include page='/WEB-INF/jsp/header.jsp'> <jsp:param name='pageName' value='Welcome Page' /> </jsp:include>

3. Assume the custom tag my:errorProne always throws a java.lang.RuntimeException with the message "File not found."
An error page has been configured for this JSP page.
Which option prevents the exception thrown by my:errorProne from invoking the error page mechanism, and outputs the message "File not found" in the response?

A) <c:try catch="ex">
<my:errorProne />
</c:try>
${ex.message}
B) <my:errorProne>
<c:catch var="ex">
${ex.message}
</c:catch>
</my:errorProne>
C) <c:try>
<my:errorProne />
</c:try>
<c:catch var="ex" />
${ex.message}
D) <c:catch var="ex">
<my:errorProne />
</c:catch>
${ex.message}
E) <c:try>
<my:errorProne />
<c:catch var="ex" />
${ex.message}
</c:try>

4. Given this fragment in a servlet:
23.
if(req.isUserInRole("Admin")) {
24.
// do stuff
25.
}
And the following fragment from the related Java EE deployment descriptor:
812.
<security-role-ref>
813.
<role-name>Admin</role-name>
814.
<role-link>Administrator</role-link>
815.
</security-role-ref>
900.
<security-role>
901.
<role-name>Admin</role-name>
902.
<role-name>Administrator</role-name>
903.
</security-role>
What is the result?

A) If line 24 executes the user's role will NOT be predictable.
B) If line 24 executes, the user's role will be Admin.
C) The deployment descriptor is NOT valid.
D) If line 24 executes, the user's role will be Administrator.
E) Line 24 can never be reached.

5. You are building JSP pages that have a set of menus that are visible based on a user's security role. These menus are hand-crafted by your web design team; for example, the SalesManager role has a menu in the file /WEB-INF/html/sales-mgr-menu.html. Which JSP code snippet should be used to make this menu visible to the user?

A) <jsp:if test='request.isUserInRole("SalesManager")'> <jsp:include file='/WEB-INF/html/sales-mgr-menu.html' /> </jsp:if>
B) <jsp:if test='request.isUserInRole("SalesManager")'> <%@ include file='/WEB-INF/html/sales-mgr-menu.html' %> </jsp:if>
C) <% if ( request.isUserInRole("SalesManager") ) { %> <%@ include file='/WEB-INF/html/sales-mgr-menu.html' %> <% } %>
D) <% if ( request.isUserInRole("SalesManager") ) { %> <jsp:include file='/WEB-INF/html/sales-mgr-menu.html' /> <% } %>

問題與答案：