多项选择题

Which three web application deployment descriptor elements allow web components to gain references toresources or EJB components？（）

A.ejb-ref
B.jdbc-ref
C.servlet-ref
D.resource-ref
E.javamail-ref
F.resource-env-ref

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多项选择题

Which three are valid URL mappings to a servlet in a web deployment descriptor？（）

A.*/*
B.*.do
C.MyServlet
D./MyServlet
E./MyServlet/*
F.MyServlet/*.jsp

多项选择题

Given the security constraint in a DD：
101.<security-constraint>
102.<web-resource-collection>
103.<web-resource-name>Foo</web-resource-name>
104.<url-pattern>/Bar/Baz/*</url-pattern>
105.<http-method>POST</http-method>
106.</web-resource-collection>
107.<auth-constraint>
108.<role-name>DEVELOPER</role-name>
109.</auth-constraint>
110.</security-constraint>
And given that "MANAGER" is a valid role-name，which four are true for this security constraint？（）

A.MANAGER can do a GET on resources in the /Bar/Baz directory.
B.MANAGER can do a POST on any resource in the /Bar/Baz directory.
C.MANAGER can do a TRACE on any resource in the /Bar/Baz directory.
D.DEVELOPER can do a GET on resources in the /Bar/Baz directory.
E.DEVELOPER can do only a POST on resources in the /Bar/Baz directory.
F.DEVELOPER can do a TRACE on any resource in the /Bar/Baz directory.

单项选择题

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