A.AB.BC.CD.DWhich JSTL tag structure supports this scen……

单项选择题Assuming the tag library in the exhibit is imported with the prefix forum， which custom tag invocation produces a translation error in a JSP page？（）

A.A
B.B
C.C
D.D
E.E

单项选择题Whichthe securitymechanismusestheconceptofarealm？（）

A. authorization
B. data integrity
C. confidentiality
D. authentication

单项选择题Whichthe basicauthenticationtypeisoptionalforaJ2EE1.4compliantwebcontainer？（）

A. HTTP Basic Authentication
B. Form Based Authentication
C. HTTP Digest Authentication
D. HTTPS Client Authentication

单项选择题Whenaddingaelementtoawebapplicationdeploymentdescriptor，theinclusionofwhichsub-elementrequiresthedefinitionofanerrorpage（）？

A. <realm-name> 
B. <auth-metod> 
C. <auth-constraint> 
D. <form-login-config> 
E. <user-data-constaint>

单项选择题Whichsecuritymechanismcanbedirectedthroughtheelementinawebdeploymentdescriptor（）？

A. authorization
B. data integrity
C. confidentiality
D. authentication