单选题The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows: 11. 12. 13. 14. 15. The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is ItemSimpleTag.ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.Which is true?()AItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and castingthe result to ShoppingListTag.BShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() andcasting each to an ItemSimpleTag.CIt is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy becauseone is a Simple tag and the other is a Classic tag.DShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on thePageContext and casting each to an ItemSimpleTag.EItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass()on the PageContext and casting the result to ShoppingListTag.

单选题
The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows: 11. 12. 13. 14. 15. The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is ItemSimpleTag.ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.Which is true?()
A

ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and castingthe result to ShoppingListTag.

B

ShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() andcasting each to an ItemSimpleTag.

C

It is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy becauseone is a Simple tag and the other is a Classic tag.

D

ShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on thePageContext and casting each to an ItemSimpleTag.

E

ItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass()on the PageContext and casting the result to ShoppingListTag.


参考解析

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单选题The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows: 11. 12. 13. 14. 15. The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is ItemSimpleTag.ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.Which is true?()AItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and castingthe result to ShoppingListTag.BShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() andcasting each to an ItemSimpleTag.CIt is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy becauseone is a Simple tag and the other is a Classic tag.DShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on thePageContext and casting each to an ItemSimpleTag.EItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass()on the PageContext and casting the result to ShoppingListTag.

单选题Assume a tag handler extends TagSupport. Which is used within the tag handler to get an attribute “foo” that is in the application scope?()A pageContext.getAttribute(“foo”);B getPageContext().getAttribute(“foo”);C pageContext.getApplicationScope(“foo”);D pageContext.getAttribute(“foo”,pageContext.APPLICATION_SCOPE).getAttribute(“foo”);E getPageContext().getScope(pageContext.APPLICATION_SCOPE).getAttribute(“foo”);

单选题Assume the tag handler for a st:simpletag extends SimpleTagSupport. In what way can scriptlet code be used in the body of st:simple?()A Set the body content type to JSP in the TLDB Scriptlet code is NOT legal in the body of st:simpleC Add scripting-enabled= “true” to the start tag for the st:simple elementD Add a pass-through Classic tag with a body content type of JSP to the body of st:simple, and      place the scriptlet code in the body of that tag.

多选题A custom JSP tag must be able to support an arbitrary number of attributes whose names are unknown when the tag class is designed.  Which two are true? ()AA  element in the echo tag LTD must have the value JSPBThe echo tag handler must define the setAttribute (String key, String value) methodCThe true element must appear in the echo tag TLDDThe class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.IterationTag interfaceEThe class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.DynamicAttributes interface

单选题顺风顶流情况下航行,船舶对水航程SL,对地航程SG,船速VE,航时t,则()。ASG<SL<VEtBSL>VEt,且SL>SGCSG>SL>VEtDSL<VEt,且SG>SL

单选题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.  2.  ... 11. ...  ... ... 99.  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?()Apublic void doTag() {JspTag docTag = findAncestorWithClass(this, DocumentTag.class); ((DocumentTag)docTag).addCitation(this.docID);}Bpublic void doStartTag() {JspTag docTag = findAncestorWithClass(this, DocumentTag.class); ((DocumentTag)docTag).addCitation(this.docID);}Cpublic void doTag() {. Tag docTag = findAncestor(this, DocumentTag.class); . ((DocumentTag)docTag).addCitation(this.docID);. }Dpublic void doStartTag() {. Tag docTag = findAncestor(this, DocumentTag.class); . ((DocumentTag)docTag).addCitation(this.docID);. }

单选题The tag handler for n:recurse extends SimpleTagSupport.Assuming an n:recurse tag can either contain an empty body or another n:recurse tag, which strategy allows the tag handler for n:recurse to output the nesting depth of the deepest n:recurse tag?()A  It is impossible to determine the deepest nesting depth because it is impossible for tag handlers that extend SimpleTagSupport to communicate with their parent and child tagsB  Create a private non-static attribute in the tag handler class called count of type int initialized to      oIncrement count in the doTag method. If the tag has a body, invoke the fragment for that body. Otherwise, output the value of countC  Start a counter at 1. Call getChildTags(). If it returns null, output the value of the counter.      Otherwise, increment counter and continue from where getChildTags() is called. Skip      processing of the body.D  If the tag has a body, invoke the fragment for that body. Otherwise, start a counter at 1. Call      getParent(). If it returns null, output the value of the counter. Otherwise, increment the counter      and continue from where getParent() is called.

单选题The sl:shoppingList and sl:item tags output a shopping list to the response and are used as follows: 11. 12. 13. 14. 15. The tag handler for sl:shoppingList is ShoppingListTag and the tag handler for sl:item is ItemSimpleTag.ShoppingListTag extends BodyTagSupport and ItemSimpleTag extends SimpleTagSupport.Which is true?()AItemSimpleTag can find the enclosing instance of ShoppingListTag by calling getParent() and castingthe result to ShoppingListTag.BShoppingListTag can find the child instances of ItemSimpleTag by calling super.getChildren() andcasting each to an ItemSimpleTag.CIt is impossible for ItemSimpleTag and ShoppingListTag to find each other in a tag hierarchy becauseone is a Simple tag and the other is a Classic tag.DShoppingListTag can find the child instances of ItemSimpleTag by calling getChildren() on thePageContext and casting each to an ItemSimpleTag.EItemSimpleTag can find the enclosing instance of ShoppingListTag by calling findAncestorWithClass()on the PageContext and casting the result to ShoppingListTag.

单选题Assume the tag handler for a st:simple tag extends Simple Tag Support. In what way can scriptlet code beused in the body of st:simple?()ASet the body content type to JSP in the TLDBScriptlet code is NOT legal in the body of st:simple.CAdd scripting-enabled=true to the start tag for the st:simple elementDAdd a pass-through Classic tag with a body content type of JSP to the body of st:simple, and place the scriptlet code in the body of that tag