多项选择题

Whichthe twoaretrueabouttheJSTLcoreiterationcustomtags？……

Which the two are true about the JSTL core iteration custom tags？（）

A. It may iterate over arrays， collections， maps and strings.
B. The body of the tag may contain EL code， but not scripting code.
C. When looping over collections， a loop status object may be used in the tag body.
D. It may iterate over a map， but only the key of the mapping may be used in the tag body.
E. When looping over integers （for example begin1=’1’ end=’10’）， a loop status object may not be used in the tag body.

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多项选择题Whichtwoaretrue？（）

A. The prefix ‘java’ is reserved.
B. The URI ‘myTags’ must be properly mapped to a TLD file by the web container.
C. A translation error occurs because the prefix is considered identical by the web container.
D. For the tag usage ， the tag1 must be unique in the union of tag names in ‘myTags’ and ‘moreTags

单项选择题To implement the design intent， which statement must be inserted at line 42？（）

A. session = response.getSession（）；
B. session = request.getSession（）；
C. session = request.getSession（true）；
D. session = request.getSession（false）；
E. session = request.getSession（“jsessionid”）；

多项选择题Giventhatascopedattributecartexistsonlyinauser’ssession，whichtwo，takenindependently，ensurethescopedattributecartnolongerexists？（）

A. ${cart = null}
B. <c：remove var="cart" />
C. <c：remove var="${cart}" />
D. <c：remove var="cart" scope="session" />
E. <c：remove scope="session">cart</c：remove>
F. <c：remove var="${cart}" scope="session" />
G. <c：remove scope="session">${cart}</c：remove>

单项选择题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.A
B.B
C.C
D.D
E.E

单项选择题Whichinterfacemustaclassimplementsothatinstancesoftheclassarenotifiedafteranyobjectisaddedtoasession？（）

A. javax.servlet.http.HttpSessionListener
B. javax.servlet.http.HttpSessionValueListener
C. javax.servlet.http.HttpSessionBindingListener
D. javax.servlet.http.HttpSessionAttributeListener