Can you take Online Backups if the the database is running
in NOARCHIVELOG mode?

5. How do you bring the database in ARCHIVELOG mode from
NOARCHIVELOG mode?

6. You cannot shutdown the database for even some minutes,
then in which mode you should run
the database?

Answer Posted / sanju

shut the database then do fllowing
1)In Parameter file set logfile destination
2)startup mount
3)alter database archivelog
4)alter database open
5)archive lo list;

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