在存储阵列中一组硬盘最少要有（　　）个局域热备盘。

A. B树

B. 反转

C. 位图

D. 函数索引

A. lslv -l datavg

B. lsvg -l datavg

C. lsvg -p datavg

D. lsvg datavg

A. Manager

B. Replicate

C. Extract

D. Server Collector

A. primary key

B. unique

C. check

D. not null

A. DBL

B. DDL

C. DML

D. DCL

A. /bin

B. /etc

C. /dev

D. /lib

A. 攻击和脆弱性

B. 威胁和攻击

C. 威胁和脆弱性

D. 威胁和破坏

A. 防水

B. 防火

C. 绝缘

D. 防潮

A. DBRW进程将数据写回磁盘后

B. LGWR进程将日志写入在线重做日志文件后

C. PMON进程提交进程变化后

D. SMON进程写入数据后

A. ALTER DATABASE BACKUP CONTROLFILE TO TRACE

B. ALTER DATABASE BACKUP CONTROLFILE TO BACKUP

C. ALTER DATABASE BACKUP CONTROLFILE TO ‘filename’

D. ALTER DATABASE BACKUP CONTROLFILE TO TEXT ‘filename’