多项选择题
A.Placing it in the /secure directory
B.Placing it in the /WEB-INF directory
C.Placing it in the /META-INF/secure directory
D.Creating a element within the deployment descriptor
单项选择题 After a merger with another small business， your company has inherited a legacy WAR file but the originalsource files were lost. After reading the documentation of that web application，you discover that the WARfile contains a useful tag library that you want to reuse in your own webapp packaged as a WAR file. What do you need to do to reuse this tag library？（）
多项选择题 WhichthreewebapplicationdeploymentdescriptorelementsallowwebcomponentstogainreferencestoresourcesorEJBcomponents？（）
多项选择题 WhichthreearevalidURLmappingstoaservletinawebdeploymentdescriptor？（）