问题 单项选择题

设有某社交网站,在系统的实施或运维过程中,有下列活动:

Ⅰ.在系统运行过程中,根据网站用户的增长情况,密切监控数据库空间的增长量

Ⅱ.在系统运行过程中,对系统的各数据库服务器在各个时段的CPU和内存使用情况进行监控

Ⅲ.修改数据库结构及相关的应用程序,使用户发的帖子中能加载图片或视频

Ⅳ.密切监视每一个帖子,删除侵权帖子

Ⅴ.制定备份计划,进行数据备份

Ⅵ.查找并删除系统中的广告帖

以上活动,一般情况下应由DBA执行的工作是()。

A.仅Ⅰ、Ⅱ和Ⅴ

B.仅Ⅰ和Ⅱ

C.仅Ⅰ、Ⅱ、Ⅲ和Ⅴ

D.全是

答案

参考答案:C

解析:

一般来说,由数据库管理员(DBA)执行的工作包括:

①数据库的转储和恢复。

②数据库的安全性和完整性控制。

③数据库性能的监控分析和改时。

④数据库的重组和重构。

该题干中,Ⅰ、Ⅱ属于③,Ⅲ属于④,Ⅴ属于①。

填空题
用方框中所给词的正确形式填空,使短文内容完整。注意有两个词是多余的。
land   try   candy   relative   such   never   anything   watch   together   usual   south   clean
      In China, the Spring Festival is the most important holiday. It falls on the first day of the first lunar month.
      Before Spring Festival comes, people go out to buy things,   1   as meat, chicken, fruit, sweets and new
clothes. They   2   their houses and decorate them. The Chinese character "fu" is a must. It is   3   upside down,
which means "fu" comes. 
      The celebrations begin on the eve of the lunar New Year. The family get   4   for a big dinner, If a person is
far from home, he or she will always   5   to get home for it. After the dinner, the whole family will get together,
chat and   6  TV. 
      During the holidays, they go to visit   7   and friends and exchange New Year greetings. They sit around
talking and eating   8  , cakes and all kinds of delicious food. Every family prepares   9   special. Each child will
get money as a New Year gift. People in the north often eat dumplings for breakfast while the   10   people often
eat niangao.
1.                  2.                  3.                  4.                  5.             
6.                  7.                  8.                  9.                  10.              
判断题