72. You want to enable archiving on your database. Presently, the database is running in
NOARCHIVELOG mode. Given below are the steps to accomplish the task in random order:
1: Shut down the instance.
2: Execute the ALTER DATABASE ARCHIVELOG command.
3: Start up the instance and mount the database.
4: Set the DB_RECOVERY_FILE_DEST initialization parameter to $ORACLE_HOME/dest_1.
5: Open the database.
Which is the correct sequence of steps for accomplishing the task?
A.4, 1, 3, 2, 5
B.1, 3, 4, 5, 2
C.1, 3, 2, 5; 4 not required
D.4, 1, 5, 2; 3 not required
E.1, 3, 4, 5; 2 not required
Answer: C
现象重现：
1、查看此数据库是否为归档模式
sys@TEST0910> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 28
Current log sequence 30
2、关闭数据库，再启动到mount状态
sys@TEST0910> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
sys@TEST0910> startup mount;
ORACLE instance started.
Total System Global Area 2505338880 bytes
Fixed Size 2230952 bytes
Variable Size 587203928 bytes
Database Buffers 1895825408 bytes
Redo Buffers 20078592 bytes
Database mounted.
3、改为归档模式
sys@TEST0910> alter database archivelog;
Database altered.
4、打开数据库
sys@TEST0910> alter database open;
Database altered.
5、查询现在是否为归档模式
sys@TEST0910> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 28
Next log sequence to archive 30
Current log sequence 30