QUESTION 117
You want to track and store all transactional changes to a table over its lifetime. To accomplish this task, you
enabled Flashback Data Archive with the retention of 5 years. After some time, the business requirement
changed and you are asked to change the retention period from 5 years to 3 years. To accomplish this, you
issued the following command:
ALTER FLASHBACK ARCHIVE fla1 MODIFY RETENTION 3 YEARS;
What is the outcome of this command?
A. The command produces an error because the retention period cannot be reduced
B. All historical data older than 3 years is purged from the flashback archive FLA1
C. All historical data is retained but the subsequentflashback data archives are maintained for only 3 years
D. All historical data is transferred to flashback logs and the flashback archive is refreshed to set a new
retention time
Answer: B
同128题：http://blog.csdn.net/rlhua/article/details/19208639
Explanation/Reference:
Section: Flashback Operations & Configuration