OracleDBA数据库结构试题选2

1
1. before the crash occurs
3. immediately after re-opening the database before the recovery

2
1. users tablespace
3. temporary tablespace

3
1. to make the database user friendly
3. to store application data

4
1. aud$
3. user_history$

5　
1. extent
3. tablespace

6　
1. system
3. rollback