561.If you issue the command shutdown abort prior to trying to put the database in ARCHIVELOG mode,
what will be the result when you issue the command alter database archivelog?
A. The alter database archivelog command will fail.
B. The alter database archivelog inconsistent command must be used to put the database in
ARCHIVELOG mode.
C. The alter database archivelog command will succeed.
D. The alter database archivelog command will ask if you want to make the database consistent first.
E. There is no alter database archivelog command. The correct command is alter database alterlogging.
Answer: A

验证：
[oracle@db01 ~]$ sqlplus / as sysdba


SQL*Plus: Release 11.2.0.4.0 Production on Mon Mar 7 10:33:02 2016


Copyright (c) 1982, 2013, Oracle.  All rights reserved.




Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options


SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.


Total System Global Area  413372416 bytes
Fixed Size                  2253784 bytes
Variable Size             327158824 bytes
Database Buffers           79691776 bytes
Redo Buffers                4268032 bytes
Database mounted.
SQL> alter database noarchivelog;


Database altered.


SQL> alter database open
  2  /


Database altered.


SQL> select log_mode from v$database;


LOG_MODE
------------
NOARCHIVELOG


SQL> shutdown abort    
ORACLE instance shut down.
SQL> startup mount
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE instance started.


Total System Global Area  413372416 bytes
Fixed Size                  2253784 bytes
Variable Size             327158824 bytes
Database Buffers           79691776 bytes
Redo Buffers                4268032 bytes
Database mounted.
SQL> alter database archivelog;
alter database archivelog
*
ERROR at line 1:
ORA-00265: instance recovery required, cannot set ARCHIVELOG mode

只有在实例恢复之后，才能切为归档模式