【名词&注释】
应用软件(application software)、系统故障(system fault)、预防性(preventive)、对立性(opposition)、不必要的(unnecessary)、未完成(not skated)、打补丁(renew in)、交付使用(initiation into service)、完成任务(task-performing)、信息系统维护
[多选题]针对Linux主机，一般的加固手段包括（）。
A. 打补丁(renew in)
B. 关闭不必要的服务
C. 限制访问主机
D. 切断网络
查看答案&解析
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举一反三：
[单选题]关于事务的故障与恢复，下列描述正确的是(54)。
A. 事务日志是用宋记录事务执行的频度
B. 采用增量备份，数据的恢复可以不使用事务日志文件
C. 系统故障的恢复只需进行重做(Redo)操作
D. 对日志文件设立检查点目的是为了提高故障恢复的效率
[单选题]All computers need some sort of(71)(OS). Tile majority of modem home computers use some form. of Microsofts OS. The original Microsoft OS was called DOS though most computers use Windows. Windows comes in various versions beginning with(72)x then 95, 98, ME and currently XP. A few computers use IBMs O/SApples Mac uses their own OS beginning with OS I though most modem Macs use version x or x. Apples latest version is OS 10.x. In the past large companies and institutions would have an OS design exclusively for them but as the Commercial OS become more sophisticated the benefits of this practice is becoming less apparent. Some computer professionals,(73)(ISP)and(74)computer users use an OS such as UNIX(or a variant such as Linux), Windows NT or 2000(Win2k)or one of the other network or(75)based OS.
A. Operated System
B. Operated System
C. Operating System
D. Operation System
[单选题]
B． upon
C． against
D． with
A. aboveB． upon
B. against
C. with
[单选题]系统响应时间和作业吞吐量是衡量计算机系统性能的重要指标。对于一个持续处理业务的系统而言，其(4)。
A. 响应时间越短，作业吞吐量越小
B. 响应时间越短，作业吞吐量越大
C. 响应时间越长，作业吞吐量越大
D. 响应时间不会影响作业吞吐量
[单选题]当信息系统交付使用(initiation into service)后，若要增加一些新的业务功能，则需要对系统进行(49)。
A. 纠错性维护
B. 适应性维护
C. 完善性维护
D. 预防性维护
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