QUESTION NO: 390 
You executed the following command in the Recovery Manager (RMAN):
RMAN> REPORT NEED BACKUP days 3; 
What is the output of this command?  
A. A list of files that require a backup within 3 days 
B. A list of files requiring more than 3 days of archivelogs to apply 
C. A list of files that RMAN recommends be backed up only once in every three days, based on low volatility 
D. A list of files for which a backup as already been performed in the last three days and which is required to 
be backed up again based on the high number of transactions performed on them 
Answer: B
您在恢复管理( RMAN)执行以下命令: 
RMAN> REPORT NEED BACKUP days 3; 
这个命令的输出是什么?
B.申请需要超过3天的归档日志文件列表
原文:http://blog.csdn.net/xuejiayue1105/article/details/49102411