How to Check the Oracle Database Archive log mode or not?
sqlplus / as sysdba
sql>archive log list
OR
sql>select log_mode from v$database;
Eg:
SQL> archive log list
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 1241
Current log sequence 1243
SQL>select log_mode from v$database;
LOG_MODE
------------
NOARCHIVELOG