【名词&注释】
电子邮件(e-mail)、垃圾邮件(spam)、译码器(decoder)、数字签名(digital signature)、质量保证(quality assurance)、单元测试(unit test)、数字证书(digital certificate)、执行时间(execution time)、面向对象分析(ooa)、质量计划编制
[单选题]邮件服务器所受攻击主要有哪些?()
A. 中继利用和垃圾邮件
B. 垃圾邮件
C. 恶意电子邮件
D. 缓冲区溢出
查看答案&解析
举一反三：
[单选题]CPU中译码器的主要作用是进行() 。
A. 地址译码
B. 指令译码
C. 数据译码
D. 选择多路数据至ALU
[单选题]Traditional structured analysis techniques focus upon the flow of(1)within a system. Object-oriented analysis emphasizes the building of real-world models, It examines requirements from the perspective of the classes and objects found in the vocabulary of the(2)domain.Traditional system design method emphasizes the proper and effective structure of a complex system. Object-oriented design method encompasses the process of object- oriented decomposition and a(3)for depicting both logical and physical as well as static and dynamic models of the system under design.Object-oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each of which represents an(4)of some class, and whose classes are all members of a hierarchy of classes united via(5)relationships.
A. control
B. program
C. data
D. reference
[单选题]● (73) is a query language for manipulating data in a relational database.(73)
A. Assemble
B. SQL
C. C++
D. Fortran
[单选题]以下有关VPN的描述，不正确的是()
A. 使用费用低廉
B. 为数据传输提供了机密性和完整性
C. 未改变原有网络的安全边界
D. 易于扩展
[单选题]
B． 获取访问网站的权限
C． 和网站进行双向认让
D． 验证该网站的真伪
A. 向网站确认自己的身份B． 获取访问网站的权限
B. 和网站进行双向认让
C. 验证该网站的真伪
[单选题]项目质量管理由(58)三方面构成。
A. 质量计划编制、质量保证、质量控制
B. 测试计划、过程控制、质量控制
C. 单元测试、集成测试、验收测试
D. 项目计划、过程控制、验收测试
[单选题]若每一条指令都可分解为取指、分析和执行三步。已知取指时间为5t，分析时间为2t，执行时间(execution time)为5t。如果按顺序方式从头到尾执行完500条指令需(3)。如果按[执行]k、[分析]k+1、[取值]k+2重叠的流水线方式执行，从头到尾执行完500条指令需(4)t。(41)
A. 5590
B. 5595
C. 6000
D. 6007
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