多项选择题
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
多项选择题 Your web application uses a simple architecture in which servlets handle requests and then forward to aJSP using a request dispatcher. You need to pass information calculated in the servlet to the JSP for view generation.This information must NOT be accessible to any other servlet，JSP or session in the webapp. Which two techniques can you use to accomplish this goal？（）
多项选择题 A developer chooses to avoid using SingleThreadModel but wants to ensure that data is updated in athread-safe manner. Which two can support this design goal？（）
单项选择题 WhichJSTLcodesnippetcanbeusedtoimportcontentfromanotherwebresource？（）