could you provide some more details on what you actually want to migrate?
If it's just the database content, exp/imp or even better expdp/impdp would be the two tools you are searching for. Export all schemas you need from 11.2 SE and import the dumps to 11.2 XE and you are done.
There are some tables in my database which have no rows and all the tables in database are created with *"SEGMENT CREATION DEFERRED"* so these tables are not getting exported.
Is there any other way by which i can get all objects migrated properly from Oracle 11.2 SE to 11g XE Beta