
【名词&注释】
缓冲区(buffer)、完整性保护(integrity protection)、人际关系(interpersonal relationship)、建设项目(construction project)、安全可靠(safe and reliable)、检查点(checkpoint)、软硬件故障、图像文件(image file)、数据库事务处理、忽略不计
[单选题]在一个单CPU的计算机系统中,采用按优先级抢占的进程调度方案,且所有任务可以并行使用I/O设备。现在有三个任务T1、T2和T3,其优先级分别为高、中、低,每个任务需要先占用CPU 10ms,然后再使用I/O设备13ms,最后还需要再占用CPU 5ms。如果操作系统的开销忽略不计,这三个任务从开始到全部结束所用的总时间为()ms
A. 61
B. 84
C. 58
D. 48
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[多选题]● System analysis is traditionally done top-down using structured analysis based on (71). Object-oriented analysis focuses on creation of models. The three types of theanalysis model are (72). There are two substages of object-oriented analysis. (73) focuses on real-world things whose semantics the application captures. The object constructedin the requirement analysis shows the (74) of the real-world system and organizes it intoworkable pieces.(75)addresses the computer aspects of the application that are visible tousers. The objects are those which can be expected to vary from time to time quite rapidly.(71)
A. functional decomposition
B. object abstraction
C. data inheritance
D. information generalization
E. (72)
F. function model,class model and state model
G. class model,interaction model and state model
H. class model,interaction model and sequence model
I. function model,interaction model and state model
J. (73)
K. Static analysis
L. Semantic analysis
M. Scope analysis
N. Domain analysis
O. (74)
P. static structure
Q. system components
R. data flows
S. program procedures
T. (75)
U. Program analysis
V. Function requirement
W. Application analysis
X. Physical model
[单选题]下面有关ITU-T X.25建议的描述中,正确的是( )。
A. 通过时分多路技术,帧内的每个时槽都预先分配给了各个终端
B. X.25的网络层采用无连接的协议
C. X.25网络采用LAP
D. D协议进行数据链路控制
E. 如果出现帧丢失故障,则通过顺序号触发差错恢复过程
[单选题]
B. 800MHz
C. 19.2GHz
D. 2.4GHz
A. 600MHzB. 800MHz
B. 19.2GHz
C. 2.4GHz
[单选题]
B. 程序文件
C. 检查点文件
D. 图像文件(image file)
A. 日志文件B. 程序文件
B. 检查点文件
C. 图像文件(image file)
[单选题]建设项目团队过程所使用的技术不包括()。
A. 人际关系技能
B. 基本规则
C. 人事评测工具
D. 项目人员分派
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