Your database is in NOARCHIVELOG mode. You want to enable archiving for the database. Examine the steps: 1. Execute the ALTER DATABASE ARCHIVELOG command. 2. Execute SHUTDOWN IMMEDIATE. 3. Execute…

This sequence is incorrect because the database must be shut down and mounted before ALTER DATABASE ARCHIVELOG can be executed, and setting DB_RECOVERY_FILE_DEST is typically done via ALTER SYSTEM and not a core step for mode change.

This sequence is incorrect because the database needs to be shut down before starting in mount mode, and setting DB_RECOVERY_FILE_DEST is a separate configuration, not a mandatory step for enabling ARCHIVELOG mode itself.

To change from NOARCHIVELOG to ARCHIVELOG mode, the database must be shut down (step 2) and then started in MOUNT mode (step 3). While in MOUNT mode, the `ALTER DATABASE ARCHIVELOG` command (step 1) is executed to enable archiving. Finally, the database can be opened (step 6) for normal operations.

This sequence is incorrect because the database must be mounted, not started in NOMOUNT mode, to execute the ALTER DATABASE ARCHIVELOG command.