 |
|
|
| 返回 | 主页 |
全国计算机等级考试四级考试笔试模拟试题一(5)
[摘要]
（61）What is the contrapositive of the relation represented in the exhibit shown
below? （ ）。
4
2
1
35
A) R={<1,2>,<1,3>,<1,4>,<1,5...
（61）What is the contrapositive of the relation represented in the exhibit shown
below? （ ）。
4
2
1
35
A) R={<1,2>,<1,3>,<1,4>,<1,5>}
B) R={<1,1>,<2,2>,<3,3>,<4,4>,<5,5>}
C) R={<2,1>,<4,1>,<2,2>,<1,3>,<3,2>,<1,4>,<4,4>,<5,4>}
D) R={<1,2>;,<3,1}>,<1,4>,<2,2>,<2,3>,<4,1>,<4,4>,<4,5>}
（62）Which function is NOT served by building a prototype? （ ）。
A) It takes the place of the final system.
B) It assists in gathering software requirements.
C) It assists in estimating the cost of the project.
D) It is used as the foundation of the larger projects.
（63）Which of the following statements about testing software with data is (are)
true? （ ）。
I. The primary purpose of such testing is to find errors.
II.Such testing can demonstrate the existence of errors but cannot
demonstrate the absence of errors.
A) Neither B) Ⅰ only C) Ⅱ only D) Ⅰ and Ⅱ
（64）Inthefollowing statements about functional dependency, whichone isincorrect?
（ ）。
A) If X＇X, then X→X＇.
B) If X→Y and Y＇Y, then X→Y＇.
C) If X→Y and X＇X, then X＇→Y.
D) If X→Y and Y→Z, then X→Z.
（65）Which function is used to lock a file in FoxPro DBMS? （ ）。
A) FLOCK( ) B) RLOCK( ) C) LOCK( ) D)LOCK
（66）Which is NOT a characteristic of an RISC processor? （ ）。
A) a high clock speed
B) a highly optimized pipeline
C) a few general-purpose registers
D) a limited amount of small instructions
(67) Local bus can reduce the occupation time of CPU. For the EISA local bus,
commonly the time can be reduced to（ ）。
A) 42% B) 22% C) 12% D) 2%
7
（68）In the modulation style of PSK ,if a kind of Modem＇s modulation rate is
3200baud and it＇s phase is 8 , what is the data transfer rate of this kind
of Modem ? （ ）。
A) 14.4kbps B) 28.8kbps C) 9600bps D) 3200bps
（69）Which routing select algorithm is described below ? （ ）。
According to a kind of fix regulation , the select algorithm of route works
and has nothing to do with the network information newly.（ ）。
A) Static Routing Algorithm B) Dynamic Routing Algorithm
C) Centralized Routing Algorithm D) Distributed Routing Algorithm
（70）About the following IP addresses ,Which is incorrect ? （ ）。
A) 201.199.255.11 B) 201.198.132.1
C) 201.199.128.6 D) 201.198.134.257
其它培训参考信息：
全国计算机等级考试四级考试笔试模拟试题一(4)
全国计算机等级考试四级考试笔试模拟试题一(3)
全国计算机等级考试四级考试笔试模拟试题一(2)
全国计算机等级考试四级考试笔试模拟试题一(1)
05计算机等级考试四级笔试样题
05年9月等级考试三级网络考前密卷(一)7
05年9月等级考试三级网络考前密卷(一)6
05年9月等级考试三级网络考前密卷(一)5
信息来自互联网，敬请核实，谨慎使用
