Dear all
we know that SessionFactory is nothing but Second leve cache.when we close session,then the all objects which are in session will come to SessionFactory by default? or do we need to call everytime session.evict() before closing the connection.

Only Session Cache is available by default.
SessionFactory level cache has to be configured in .cgf.xml file.
session.evict() is to remove the entity from a session and it has no relevance to context of importing session cache to session factory cache.