中国教育考试网－全国计算机等级考试四级笔试样卷数据库工程师.htm

数据库系统工程师的考点 难点 很值得一看的有

            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">堆文件</SPAN><SPAN 
            lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN>B</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">聚集文件</SPAN><SPAN 
            lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><SPAN 
            style="mso-tab-count: 1"> </SPAN>C</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">索引文件</SPAN><SPAN 
            lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><SPAN 
            style="mso-tab-count: 1"> </SPAN>D</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">散列文件</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p></o:p></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>14</SPAN>）有一个事务<SPAN 
            lang=EN-US>T</SPAN>要更新数据库中某表列的值，<SPAN lang=EN-US>DBMS</SPAN>在执行<SPAN 
            lang=EN-US>T</SPAN>时发现更新后的值超出了该列的值定义范围，因此异常终止了<SPAN 
            lang=EN-US>T</SPAN>。为了保证数据的正确性及一致性，<SPAN 
            lang=EN-US>DBMS</SPAN>会执行下列哪个恢复操作？<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">A</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）<SPAN 
            lang=EN-US>undo<SPAN style="mso-tab-count: 1"> 
            </SPAN>B</SPAN>）介质恢复<SPAN lang=EN-US><SPAN style="mso-tab-count: 1"> 
            </SPAN>C</SPAN>）进程恢复<SPAN lang=EN-US><SPAN style="mso-tab-count: 1"> 
            </SPAN>D</SPAN>）<SPAN lang=EN-US>redo<o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>15</SPAN>）关于数据库系统中数据的静态转储和动态转储机制，下述说法正确的是<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">A</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）静态转储时允许其他事务访问数据库<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">B</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）动态转储时允许在转储过程中其他事务对数据进行存取和修改<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">C</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）静态转储能够保证数据库的可用性<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">D</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）动态转储无法保证数据库的可用性<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>16</SPAN>）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">在数据库系统中，下列哪个映像关系用于提供数据与应用程序间的逻辑独立性？<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">A</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">外模式<SPAN 
            lang=EN-US>/</SPAN>模式</SPAN><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><SPAN 
            style="mso-tab-count: 1">&nbsp; </SPAN>B</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">模式<SPAN 
            lang=EN-US>/</SPAN>内模式</SPAN><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><SPAN 
            style="mso-tab-count: 1">&nbsp; </SPAN>C</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">外模式<SPAN 
            lang=EN-US>/</SPAN>内模式</SPAN><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp; </SPAN>D</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">逻辑模式<SPAN 
            lang=EN-US>/</SPAN>内模式</SPAN><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p></o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>17</SPAN>）在<SPAN lang=EN-US>SQL Server 
            2000</SPAN>中，事务日志备份<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">A</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）对故障还原模型没有要求</SPAN><SPAN 
            lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt"><SPAN 
            style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN 
            lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><SPAN 
            style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN>B</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）要求故障还原模型必须是完全的<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">C</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）要求故障还原模型必须是简单的<SPAN 
            lang=EN-US><SPAN style="mso-tab-count: 1"> 
            </SPAN>D</SPAN>）要求故障还原模型不能是简单的<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>18</SPAN>）关于数据库的试运行和功能与性能测试，下列说法正确的是<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">A</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）对数据库系统的转储和恢复能力的测试属于系统的功能测试范畴<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">B</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）在进行数据库功能测试时，一般要先装入大规模的数据<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">C</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）数据库试运行一般是与编写调试程序的工作同步开展的<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">D</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）数据库系统的压力测试、并发访问测试、查询效率测试一般属于性能测试范畴<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>19</SPAN>）关于数据仓库设计，下述说法正确的是<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">A</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）数据仓库项目的需求很难把握，所以不可能从用户的需求出发来进行数据仓库的设计，只能从数据出发进行设计<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">B</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）在进行数据仓库主题数据模型设计时，应该按面向部门业务应用的方式来设计数据模型<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">C</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）在进行数据仓库主题数据模型设计时要强调数据的集成性<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">D</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）在进行数据仓库概念模型设计时，需要设计实体关系图，给出数据表的划分，并给出每个属性的定义域<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>20</SPAN>）<SPAN 
            style="COLOR: black">关于分布式数据库系统，下述说法正确的是</SPAN><SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">A</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）查询代价主要考虑<SPAN 
            lang=EN-US>CPU</SPAN>代价和<SPAN lang=EN-US>I/O</SPAN>代价<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">B</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）分布透明性是指用户需要并能完全看清数据分片的位置、分片的分配位置以及数据复制的过程<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">C</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）分布式查询优化一般不需要考虑操作的执行顺序和数据在不同场地间的传输顺序<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">D</SPAN><SPAN 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">）执行分布式数据库查询时，导致数据传输量大的主要原因是数据间的连接操作和并操作<SPAN 
            lang=EN-US><o:p></o:p></SPAN></SPAN></P>
            <P><SPAN lang=EN-US 
            style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体"><o:p>&nbsp;</o:p></SPAN></P>
            <P><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体">（<SPAN 
            lang=EN-US>21</SPAN>）已知下列员工关系表<SPAN