The LOG_ARCHIVE_FORMAT parameter is set to'ora_%t_%s_%r.log'.
Which statement regarding the archived redo log files,created in an earlier incarnation of the database,is true?
A. The archived redo log files will be overwritten.
B. The archived redo log files are deleted automatically.
C. The archived redo log files should be moved to some other location.
D. The archived redo log files are still maintained because the file names are unique.
答案：（D）
解析：
可以设置LOG_ARCHIVE_FORMAT参数,使用一些特殊字符
%t：线程号
%s：日志序号
%r：resetlog ID（是一个时间戳）