Doubt in setMaxInactiveInterval

[raja ram]

Hi,

Which of the following values used with setMaxInactiveInterval() will not cause the session to expunge.

1.-1
2.-2
3.0
4.1
5.2

My answers are 1,2,3 but correct answers given are 1,2 why not 3

Thanks

[Rufus Addis]

From the specs:

setMaxInactiveInterval()
Specifies the time, in seconds, between client requests before the servlet container will invalidate this session. A negative time indicates the session should never timeout.

So a zero value will cause the container to immediately expunge the session!

Rufus.