【名词&注释】
可靠性(reliability)、数据传输、产品化(product forming)、信息隐蔽(information hiding)、高级程序设计语言(high level programming language)、快速以太网(fast ethernet)、消息来源(news source)、物理层标准(physical layer standard)
[单选题]在非安全的通信环境中，为了保证消息来源(news source)的可靠性，通常采用的安全防护技术是()
A. 信息隐蔽技术
B. 数据加密技术
C. 消息人技术
D. 数据水印技术
查看答案&解析
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举一反三：
[单选题]●在面向对象方法中，对象可看成是属性（数据）以及这些属性上的专用操作的封装体。封装是一种(46)技术。(46)
A. 信息隐蔽
B. 组装
C. 固化
D. 产品化
[单选题]高级程序设计语言中用于描述程序中的运算步骤、控制结构及数据传输的是(20)。
A. 语句
B. 语义
C. 语用
D. 语法
[单选题]关系模式SCS(Sno，Cno，Score)中，Sno是学生学号，Cno是课程号，Score是成绩。若要查询每门课成绩的平均成绩，且要求查询结果按平均成绩升序排列，平均成绩相同时，按课程号降序排列，可用SQL语言写为(33)。若查询结果仅限于平均分数超过85分的，则应(34)。(51)
A. S
B. EL
C. E
D. CT
E. Cno，AVG(Score)
F. FROM S
G. CS GROUP BY Score OR
H. D
I. ER BY 2.
J. Cno
K. D
L. ES
M. C
N. SELECT Cno，AVG(Score) FROM SCS GROUP BY Cno ORDER BY 2.Cno DESC
[单选题]以太网100BASE-TX标准规定的传输介质是(61)。
A. 3类UTP
B. 5类UTP
C. 单模光纤
D. 多模光纤
[多选题]● At a basic level, cloud computing is simply a means of delivering IT resources as(71) Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, networking, programming tools, even communication services and collaboration (72).Cloud computing began as large-scale Internet service providers such as Google, Amazon,and others built out their infrastructure. An architecture emerged: massively scaled, (73)distributed system resources, abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on (74)“somewhere on the Intemet” and the application runs on both the“cloud servers” and the user's browser.
A. Both clouds and grids are built to scale horizontally very efficiently. Both are built to withstand failures of(75)elements or nodes. Both are charged on a per-use basis. But while grids typically process batch jobs, with a defined start and end point, cloud services can be continuous. What's more, clouds expand the tyes of resources available — file storage,databases, and Web services — and extend the applicability to Web and enterprise applications.
B. hardware
C. computers
D. services
E. software
F. computers
G. disks
H. machines
I. tools
J. horizontally
K. vertically
L. inclined
M. decreasingly
N. clients
O. middleware
P. servers
Q. hard disks
R. entire
S. individual
T. general
U. separate
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