中级数据库系统工程师单项选 择考试卷模拟考试题

1、姓名：_ 班级：_ 学号：_-密-封 -线- 中级数据库系统工程师单项选 择考试卷模拟考试题考试时间：120分钟 考试总分：100分题号一二三四五总分分数遵守考场纪律，维护知识尊严，杜绝违纪行为，确保考试结果公正。1、some of the keys have a special use. there are referred to as command keys. the 3 most common are the control or （ ） , alternate or （ ） and the shift keys though there can be more (the window

2、s key for example or the command key). each key on a standard keyboard has one or two characters. press the key to get the lower character and hold shift to get the upper. disk drives - all （ ） need a drive to get information off - or （ ） - and put information on the disk - or （ ） . each drive is de

3、signed for a specific type of disk whether it is a cd, dvd, hard disk or floppy. often the term diskand driveare used to describe the same thing but it helps to understand that the disk is the storage device which contains computer files-or software - and the drive is the mechanism that runs the dis

4、k.the 3 most common are the control or （ ）. （ ）a.conb.ctrlc.cotld.ctr2、some of the keys have a special use. there are referred to as command keys. the 3 most common are the control or （ ） , alternate or （ ） and the shift keys though there can be more (the windows key for example or the command key).

5、 each key on a standard keyboard has one or two characters. press the key to get the lower character and hold shift to get the upper. disk drives - all （ ） need a drive to get information off - or （ ） - and put information on the disk - or （ ） . each drive is designed for a specific type of disk whe

6、ther it is a cd, dvd, hard disk or floppy. often the term diskand driveare used to describe the same thing but it helps to understand that the disk is the storage device which contains computer files-or software - and the drive is the mechanism that runs the disk.alternate or （ ） and the shift keys

7、though there can be more (the windows key for example or the command key). （ ）a.aib.altc.antd.alnt3、some of the keys have a special use. there are referred to as command keys. the 3 most common are the control or （ ） , alternate or （ ） and the shift keys though there can be more (the windows key for

8、 example or the command key). each key on a standard keyboard has one or two characters. press the key to get the lower character and hold shift to get the upper. disk drives - all （ ） need a drive to get information off - or （ ） - and put information on the disk - or （ ） . each drive is designed fo

9、r a specific type of disk whether it is a cd, dvd, hard disk or floppy. often the term diskand driveare used to describe the same thing but it helps to understand that the disk is the storage device which contains computer files-or software - and the drive is the mechanism that runs the disk.disk dr

10、ives - all （ ）a.setsb.dishesc.disksd.panels4、some of the keys have a special use. there are referred to as command keys. the 3 most common are the control or （ ） , alternate or （ ） and the shift keys though there can be more (the windows key for example or the command key). each key on a standard ke

11、yboard has one or two characters. press the key to get the lower character and hold shift to get the upper. disk drives - all （ ） need a drive to get information off - or （ ） - and put information on the disk - or （ ） . each drive is designed for a specific type of disk whether it is a cd, dvd, hard

12、 disk or floppy. often the term diskand driveare used to describe the same thing but it helps to understand that the disk is the storage device which contains computer files-or software - and the drive is the mechanism that runs the disk.a drive to get information off - or （ ）a.readb.writec.speakd.t

13、ell5、some of the keys have a special use. there are referred to as command keys. the 3 most common are the control or （ ） , alternate or （ ） and the shift keys though there can be more (the windows key for example or the command key). each key on a standard keyboard has one or two characters. press

14、the key to get the lower character and hold shift to get the upper. disk drives - all （ ） need a drive to get information off - or （ ） - and put information on the disk - or （ ） . each drive is designed for a specific type of disk whether it is a cd, dvd, hard disk or floppy. often the term diskand

15、driveare used to describe the same thing but it helps to understand that the disk is the storage device which contains computer files-or software - and the drive is the mechanism that runs the disk.on the disk - or （ ）a.readb.writec.drawd.fill6、在虚拟存储器中，通常采用（1）来提高（2）的速度。（1）处应选择（ ）a.高速虚拟存储器b.高速缓冲存储器c.

16、高速辅助存储器d.高速光盘存储器7、在虚拟存储器中，通常采用（1）来提高（2）的速度。（2）处应选择（ ）a.动态链接b.虚拟空间分配c.静态地址翻译d.动态地址翻译8、虽然采取（ ）算法可以降低平均寻道长度，但却可能导致某个进程发生“饥饿”现象。即只要不断有新进程的请求到达，该进程可能始终得不到响应。将该算法进行改进后的（ ）算法可以解决该问题。虽然采取（ ）算法可以降低平均寻道长度，但却可能导致某个进程发生“饥饿”现象l10、现有四个作业，它们提交、运行情况如下表，若采用先来先服务（fcfs）算法进行作业调度，则其平均周转时间为（ ）a.4.0b.6.875c.9.125d.10.011、

17、关于死锁的各种说法中正确的有（ ）。为了预防死锁，我们会采取很多措施，其中采用资源一次性分配措施是为了破坏（ ）条件。在互斥条件下，即某一段时间内某资源仅为一进程所占用时，有可能发生死锁在请求和保持条件下，即当进程因请求资源而阻塞，却对已获得的资源保持不放的情况下，有可能发生死锁在不剥夺条件下，即进程已获得的资源在未使用完之前不能被剥夺，而只能在使用完时由自己释放，有可能发生死锁在发生死锁时，必然存在一个进程资源的环形链。关于死锁的各种说法中正确的有（ ）。（ ）a.b.c.d.12、关于死锁的各种说法中正确的有（ ）。为了预防死锁，我们会采取很多措施，其中采用资源一次性分配措施是为了破坏（

18、）条件。在互斥条件下，即某一段时间内某资源仅为一进程所占用时，有可能发生死锁在请求和保持条件下，即当进程因请求资源而阻塞，却对已获得的资源保持不放的情况下，有可能发生死锁在不剥夺条件下，即进程已获得的资源在未使用完之前不能被剥夺，而只能在使用完时由自己释放，有可能发生死锁在发生死锁时，必然存在一个进程资源的环形链。为了预防死锁，我们会采取很多措施，其中采用资源一次性分配措施是为了破坏（ ）条件。 （ ）a.互斥b.请求和保持c.不可剥夺d.环路等待13、若对大小为n的有序顺序表进行顺序查找，当查找不成功时，平均查找长度为（ ）；当查找成功且表中仅有一个关键字等于欲查找的元素时，平均查找长度为（

19、 ）。若对大小为n的有序顺序表进行顺序查找，当查找不成功时，平均查找长度为（ ）a.nb.n+1c.n/2d.(n+1)/214、若对大小为n的有序顺序表进行顺序查找，当查找不成功时，平均查找长度为（ ）；当查找成功且表中仅有一个关键字等于欲查找的元素时，平均查找长度为（ ）。当查找成功且表中仅有一个关键字等于欲查找的元素时，平均查找长度为（ ）a.nb.n+1c.n/2d.(n+1)/215、user programs interact with the kernel through a set of standard （ ）. they request services to be pro

20、vided by the kernel. such services would include accessing a file: open close, read, write, link, or execute a file; starting or（ ）accounting records; changing ownership of a file or （ ） ; changing to a new directory; creating, （ ） , or killing a process; enabling access to hardware devices; and set

21、ting limits on system resources. unix is a multi -user, multi -tasking operating system. you can have many users logged into a system simultaneously, each running many programs. its the kernels job to keep each process and user separate and to regulate access to （ ） , including cpu, memory, disk and

22、 other l/o devices.user programs interact with the kernel through a set of standard （ ）. （ ）a.system commandsb.system transferc.system callsd.system rings16、user programs interact with the kernel through a set of standard （ ）. they request services to be provided by the kernel. such services would i

23、nclude accessing a file: open close, read, write, link, or execute a file; starting or（ ）accounting records; changing ownership of a file or （ ） ; changing to a new directory; creating, （ ） , or killing a process; enabling access to hardware devices; and setting limits on system resources. unix is a

24、 multi -user, multi -tasking operating system. you can have many users logged into a system simultaneously, each running many programs. its the kernels job to keep each process and user separate and to regulate access to （ ） , including cpu, memory, disk and other l/o devices.starting or （ ） account

25、ing records （ ）a.updatingb.renovatec.renewd.rehabilitate17、user programs interact with the kernel through a set of standard （ ）. they request services to be provided by the kernel. such services would include accessing a file: open close, read, write, link, or execute a file; starting or（ ）accountin

26、g records; changing ownership of a file or （ ） ; changing to a new directory; creating, （ ） , or killing a process; enabling access to hardware devices; and setting limits on system resources. unix is a multi -user, multi -tasking operating system. you can have many users logged into a system simult

27、aneously, each running many programs. its the kernels job to keep each process and user separate and to regulate access to （ ） , including cpu, memory, disk and other l/o devices.changing ownership of a file or （ ）a.routeb.passagec.trackd.directory18、user programs interact with the kernel through a

28、set of standard （ ）. they request services to be provided by the kernel. such services would include accessing a file: open close, read, write, link, or execute a file; starting or（ ）accounting records; changing ownership of a file or （ ） ; changing to a new directory; creating, （ ） , or killing a p

29、rocess; enabling access to hardware devices; and setting limits on system resources. unix is a multi -user, multi -tasking operating system. you can have many users logged into a system simultaneously, each running many programs. its the kernels job to keep each process and user separate and to regu

30、late access to （ ） , including cpu, memory, disk and other l/o devices.creating, （ ） , or killing a process. （ ）a.deferringb.suspendingc.hangingd.holding19、user programs interact with the kernel through a set of standard （ ）. they request services to be provided by the kernel. such services would in

31、clude accessing a file: open close, read, write, link, or execute a file; starting or（ ）accounting records; changing ownership of a file or （ ） ; changing to a new directory; creating, （ ） , or killing a process; enabling access to hardware devices; and setting limits on system resources. unix is a

32、multi -user, multi -tasking operating system. you can have many users logged into a system simultaneously, each running many programs. its the kernels job to keep each process and user separate and to regulate access to （ ） , including cpu, memory, disk and other l/o devices.its the kernels job to keep each process and user separate and to regulate access to （ ）a.system hardwareb.system softwarec.keyboardd.operation system20、网络管理在网络中起着非常重要的作用，其主要功能有（ ）；其中，对于ip子网的划分属于（ ）；对付入侵，防病毒等属于（ ）。配置管理故障管理安全管理性能统计计费网络管理在网络中起着非常