when to use Serializable backing bean in JSF?

Question

when to use Serializable backing bean in JSF? is there any factors to go for serialization like View Scope, Session Scope, Application Scope or is anything else which requires bean to be serialized.

Answer 1

I'd say that session-scoped beans are eligible for serialization, because the the servlet container tries to serialize everything in the session in case it (the container) is restarted.