Given a Filter class definition with this method：
21.public void doFilter（ServletRequest request，
22.ServletResponse response，
23.FilterChain chain）
24.throws ServletException， IOException {
25.// insert code here
26.}
Which should you insert at line 25 to properly invoke the next filter in the chain， or the target servlet if thereare no more filters？（）

单项选择题You need to create a JSP that generates some JavaScript code to populate an array of strings used on the client-side. Which JSP code snippet will create this array？（）

A.
B.
C.
D.

单项选择题Click the Exhibit button. The attribute  name  has a value of  Foo， What is the result if this tag handler’s tag is invoked？（）

A.Foo
B.done
C.Foodone
D.An exception is thrown at runtime
E.No output is produced from this code