(62)Software Engineering Economy is an effective part of software engineering,
which of the following content is the research content of software engineering
economy?( )。
Ⅰ.Estimation of software development cost
Ⅱ.Earn & Cost analysis of software development
Ⅲ.Adjustment of software development progress
A) Ⅲ only B) Ⅱ and Ⅲ C) Ⅰ and Ⅱ D) all
(63)Which of the following statements is correct?( )。
A) The definition phase results in the Software Requirements Specification.
B) Testing is optional in software life cycle.
C) CASE tools can only aid in the design phase of a software life cycle.
D)A change during a later phase does not require the documentation of all
earlier phases to be updated.
(64)WhatoperationonrelationsR and S produces the relationshown below? ( )。
{tuple│tuple∈R□tuple∈S}
A) Union B) Difference C) Intersection D) Division
(65)Which values are NOT permitted to be part of the primary key? ( )。
A) alpha-numeric characters B) punctuation
C) special characters D) NULL
(66)There are two styles in the evolution of instruction set , that is CISC and
RISC. Which chip belongs to the CISC?( )。
A) SOAR B) VAX-11/780 C)CDC6600 D) IBM RTPC
(67)According to the principle of CRC calculation, given a frame-bit series
M=11100111 and the multiple-term formula, frame-bit series generated by the
CRC G=110011, then the CRC is ( )。
A) 111101 B) 00011 C) 11010011 D) 1101001
(68)The main goals of Networkare sharing computer resources .The resources include
hardware、data and ( )。
A) gateway B) router C) software D) server "
(69)According to covering scope , which three classes can computer network be divided ? ( )。
A)PSN、LAN、WAN B)MAN、LAN、WAN
C)PSN、FAST Ethernet、LAN D)PSN、FAST Ethernet、MAN
(70)In HDLC Protocol , when Supervisory Frame's type code is '00 '. About the
following statements , which is correct .( )。
A)Receive Ready B)Receive not Ready C)Reject D)Selective Reject
二、论述题
论述题1
按规范设计的方法将数据库设计分为六个阶段:1 需求分析。2 概念结构设计。3 逻辑结构设计。4 数据库物理设计。5 数据库实施。6 数据库运行和维护。针对关系数据库设计的逻辑结构设计,回答下述问题:
1、逻辑设计的基本任务?
2、逻辑设计过程中,如何将E—R 模型向关系数据模型转换?
3、关系数据库逻辑设计的步骤和内容?
论述题2
模块独立性是由内聚性和耦合性两个定性指标来度量的。回答下列问题:
1. 什么是内聚性?什么是耦合性?
2. 内聚分为哪几类?耦合分为哪几类?
3. 什么是时间内聚?什么是公共耦合?
论述题3:
请说明操作系统作业管理的功能?作业调度算法是指按照什么样的原则来选取作业并投入运行,调度算法的合理性直接影响系统的效率,作业调度算法有哪些? 对算法的选择需要考虑哪些问题?
论述题4:
在数据链路层,HDLC信息帧的N(S)、N(R)域可以实现流量控制,滑动窗口也可以实现流量控制,分别依据HDLC 信息帧及滑动窗口,分别讨论下列问题:
(1) 信息帧中如果N(S)=7,N(R)=4, 问发送方不必等待确认可以连续发送多少帧?接收方下一预期接收的帧的序号?
(2) 滑动窗口中,发送窗口的大小WT=2 ,接收窗口的大小WR=1, 则发送方不必等待确认可以连续发送多少帧?接收方同时能接收多少帧?
(3)若N(S)采用3 位二进制编码时,发送窗口的最大值是多少?
模拟试题二参考答案
一、选择题
1.A 2.A 3.D 4.A 5.D 6.B 7.A 8.B 9.C 10.A
11.B 12.D 13.A 14.B 15.A 16.C 17.D 18.C 19.D 20.D
21.A 22.A 23.B 24.B 25.C 26.B 27.C 28.A 29.C 30.D
31.C 32.A 33.C 34.B 35.A 36.A 37.C 38.D 39.C 40.A
41.A 42.D 43.B 44.B 45.D 46.A 47.B 48.B 49.C 50.B
51.A 52.A 53.A 54.C 55.D 56.A 57.A 58.D 59.A 60.B
61.C 62.C 63.A 64.C 65.D 66.B 67.B 68.C 69.B 70.A
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二、论述题
论述题1 参考答案
1、逻辑
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