A. foo has the value of 0.
B. foo has the value of null.
C. foo has the value of true.
D. foo has the value of false.
E. An-exception is thrown.
F. The code will not compile.

A. 0
B. 1
C. 14
D. –15
E. An error at line 3 cause compilation to fail.
F. An error at line 4 cause compilation to fail.

A. 1
B. 2
C. 3
D. 4
E. 5

A. Compilation succeeds and 1 is printed.
B. complication succeeds and 2 is printed.
C. An error at line 8 causes compilation to fail.
D. An error at line 13 causes complication to fail.
E. An error at line 14 causes compilation to fail.

A. void setVar（float f） { x = f；}
B. public void setVar（int f） { x =f；}
C. public void setVar（float f） {return f；}
D. public double setVar（float f） {return f；}
E. protected float setVar（） { x = 3.0f； return 3.0f； }

A. InsideOne ei = eo.new InsideOne（）：
B. eo.InsideOne ei= co.new InsideOne（）：
C. InsideOne ei = EnclosingOne.new InsideOne（）：
D. EnclosingOne.insideOne ei = eo.new InsideOne（）：

A. it provides centralized request handling for incoming requests.
B. It forces resource authentication to be distributed across web components.
C. It reduces coupling between presentation-tier clients and underlying business services.
D. It can be added and removed unobtrusively， without requiring changes to existing  code.
E. It allows preprocessing and postprocessing on the incoming requests and outgoing  responses.

A. The method invoked by this function must be statie.
B. The function class must implement the Function interface.
C. The expression is NOT a valid EL expression for invoking a function.
D. The function must be declared in a web.xml file using the  element.
E. The function class must have a method with the signature：Void bloof （java.lang.Strings）

A. do GET
B. do Put
C. do Post
D. do Trace
E. do Submit
F. do Process