mooc人大单元测试1
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1
单选(2分)
( )是存储在计算机内有结构的数据的集合。
得分/总分
A.
数据库系统
B.
数据库
2.00/2.00
C.
数据库管理系统
D.
数据结构
正确答案:B你选对了
解析: D、知识点:数据库的4个基本概念
2
单选(2分)
数据库的特点之一是数据的共享,严格的讲,这里的数据共享是指( )。
得分/总分
A.
同一个应用中的多个程序共享一个数据集合
B.
多个用户、同一种语言共享数据
C.
多个用户共享一个数据文件
D.
多种应用、多种语言、多个用户互相覆盖地使用数据集合
2.00/2.00
正确答案:D你选对了
3
单选(2分)
要保证数据库的数据独立性,需要修改的是( )。
得分/总分
A.
模式与外模式
B.
模式与内模式
C.
三级模式之间的两层映射
2.00/2.00
D.
三层模式
正确答案:C你选对了
解析: D、知识点:数据库系统的结构
4
单选(2分)
数据库(DB),数据库系统(DBS)和数据库管理系统(DBMS)之间的关系是( )。
得分/总分
A.
DBS包括DB和DBMS
2.00/2.00
B.
DBMS包括DB和DBS
C.
DB包括DBS和DBMS
D.
DBS就是DB,也就是DBMS
正确答案:A你选对了
解析: D、知识点:数据库系统的组成
5
多选(2分)
数据库系统的基本特点包括( )。
得分/总分
A.
数据共享性高、冗余度低
0.67/2.00
B.
数据独立性高
0.67/2.00
C.
数据结构化
0.67/2.00
D.
数据设计面向某个具体的应用
正确答案:A、B、C你选对了
解析: D、知识点:数据库的4个基本概念
6
多选(2分)
在数据管理技术的发展过程中,经历了( )阶段。
得分/总分
A.
人工管理
0.67/2.00
B.
文件系统
0.67/2.00
C.
档案管理
D.
数据库系统
0.67/2.00
正确答案:A、B、D你选对了
7
判断(2分)
数据冗余可能导致的问题有浪费存储空间、修改复杂和潜在的数据不一致性。( )
得分/总分
A.
2.00/2.00
B.
正确答案:A你选对了
解析:知识点:数据库的4个基本概念
8
判断(2分)
数据库管理员是开发数据库的专门人员。( )
得分/总分
A.
B.
2.00/2.00
正确答案:B你选对了
解析:知识点:数据库系统的组成
解析:数据库管理员应是管理数据库的专门人员
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