545.When performing an online backup, what is the proper order of the following steps?
a. Issue the alter database end backup command.
b. Back up the archived redo logs.
c. Issue the alter database begin backup command.
d. Back up the database files.
e. Determine the beginning log sequence number.
f. Determine the ending log sequence number.
g. Force a log switch with the alter system switch logfile command.
A. a, b, c, d, e, f, g
B. c, d, a, b, e, g, f
C. f, d, b, g, a, c, e
D. e, c, d, a, g, f, b
E. a, f, b, g, e, c, d
Answer: D
确定开始的日志序号；数据库进行备份模式；备份数据文件；数据库结束备份模式；切换在线日志；确定结束的日志序号；备份归档日志；
a. Issue the alter database end backup command.
b. Back up the archived redo logs.
c. Issue the alter database begin backup command.
d. Back up the database files.
e. Determine the beginning log sequence number.
f. Determine the ending log sequence number.
g. Force a log switch with the alter system switch logfile command.
A. a, b, c, d, e, f, g
B. c, d, a, b, e, g, f
C. f, d, b, g, a, c, e
D. e, c, d, a, g, f, b
E. a, f, b, g, e, c, d
Answer: D
确定开始的日志序号；数据库进行备份模式；备份数据文件；数据库结束备份模式；切换在线日志；确定结束的日志序号；备份归档日志；
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