Which two are required elements for the  element of a web applicationdeployment descriptor？（）

单项选择题Whichelementofawebapplicationdeploymentdescriptorelementisrequired？（）

A.<realm-name>
B.<auth-method>
C.<security-role>
D.<transport-guarantee>
E.<web-resource-collection>

多项选择题Whichtwostatementsaretrueaboutthesecurity-relatedtagsinavalidJavaEEdeploymentdescriptor？（）

A.Every  tag must have at least one  tag.
B.A  tag can have many  tags.
C.A given  tag can apply to only one  tag.
D.A given  tag can contain from zero to many  tags.
E.It is possible to construct a valid  tag such that，for a given resource，no user rolescan access that resource.

单项选择题You web application uses a lot of Java enumerated types in the domain model of the application. Built intoeach enum type is a method， getDisplay（）， which returns a localized， user-oriented string. There are manyuses for presenting enums within the web application， so your manager has asked you to create a customtag that iterates over the set of enum values and processes the body of the tag once for each value； settingthe value into a page- scoped attribute called， enumValue. Here is an example of how this tag is used： 10. 11. 12.${enumValue.display} 13. 14. You have decided to use the Simple tag model to create this tag handler. Which tag handler method willaccomplish this goal？（）

A.
B.
C.
D.

多项选择题Whichtwoaretrueconcerningtheobjectsavailabletodeveloperscreatingtagfiles？（）

A.The session object must be declared explicitly.
B.The request and response objects are available implicitly.
C.The output stream is available through the implicit outStream object.
D.The servlet context is available through the implicit servletContext object.
E.The JspContext for the tag file is available through the implicit jspContext object.

单项选择题You are creating a content management system （CMS） with a web application front-end. The JSP thatdisplays a given document in the CMS has the following general structure： 1. <%-- tag declaration --%> 2. <t：document> ... 11. <t：paragraph>... <t：citation docID=’xyz’  > ...< t：paragraph> ... 99. < t：document> The citation tag must store information in the document tag for the document tag to generate a referencesection at the end of the generated web page. The document tag handler follows the Classic tag model andthe citation tag handler follows the Simple tag model. Furthermore， the citation tag could also be embeddedin other custom tags that could have either the Classic or Simple tag handler model. Which tag handlermethod allows the citation tag to access the document tag？（）

A.public void doTag（） {JspTag docTag = findAncestorWithClass（this， DocumentTag.class）； （（DocumentTag）docTag）.addCitation（this.docID）；}
B.public void doStartTag（） {JspTag docTag = findAncestorWithClass（this， DocumentTag.class）； （（DocumentTag）docTag）.addCitation（this.docID）；}
C.public void doTag（） {. Tag docTag = findAncestor（this， DocumentTag.class）； . （（DocumentTag）docTag）.addCitation（this.docID）；. }
D.public void doStartTag（） {. Tag docTag = findAncestor（this， DocumentTag.class）； . （（DocumentTag）docTag）.addCitation（this.docID）；. }