多项选择题

A. when a session is createdB. after a servlet is destr……

For which three events can web application event listeners be registered？（）

A. when a session is created
B. after a servlet is destroyed
C. when a session has timed out
D. when a cookie has been created
E. when a servlet has forwarded a request
F. when a session attribute value is changed

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热门试题

多项选择题AdeveloperchoosestoavoidusingSingleThreadModelbutwantstoensurethatdataisupdatedinathread-safemanner.Whichtwocansupportthisdesigngoal？（）

A. Store the data in a vocal variable.
B. Store the data in an instance variable.
C. Store the data in the HttpSession object.
D. Store the data in the ServletContext object.
E. Store the data in the ServletRequest object.

多项选择题ARequestDispatchercanbeobtainedfromwhichtwoobjects？（）

A. ServletConfig
B. ServletContext
C. HttpServletRequest
D. HttpServletResponse

多项选择题Inwhichtwolocationscanlibrarydependenciesbedefinedforawebapplication？（）

A. the web application deployment descriptor
B. the /META-INF/dependencies.xml file
C. the /META-INF/MANIFEST.MF manifest file
D. the /META-INF/MANIFEST.MF manifest of a JAR in the web application classpath

单项选择题Which defines the welcome files in a web application deployment descriptor？（）

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

多项选择题Whichthreearedescribedinthestandardwebapplicationdeploymentdescriptor？（）

A. session configuration
B. MIME type mappings
C. context root for the application
D. servlet instance pool configuration
E. web container default port bindings
F. ServletContext initialization parameters