2019大学慕课答案 digital electronics(南京工业职业技术大学) 最新大学MOOC满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2019-02-18到2019-06-30
本篇答案更新状态:已完结

2 Number Systems, Operations, and Codes Unit 2 test

1、 问题:In decimal system, there are 9 digit
选项：
A:正确
B:错误
答案: 【错误】

2、 问题:in binary system, it has only two symbols, 0 ,and 1
选项：
A:正确
B:错误
答案: 【正确】

3、 问题:for a binay code 0001 0000 ,its decimal number is 10
选项：
A:正确
B:错误
答案: 【错误】

4、 问题:convet the binary numer 1011 to decimal, we may get 11
选项：
A:正确
B:错误
答案: 【正确】

5、 问题:Convert decimal number 12 to binary number, the result is 1100
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:for binary number 11 and 01, we may get 12  when 11+01
选项：
A:正确
B:错误
答案: 【错误】

7、 问题:adding binary numers 100+10, we may get 110
选项：
A:正确
B:错误
答案: 【正确】

8、 问题:perform binary substraction 11-01 and decimal substraction 11-01, we may get the same resut 
选项：
A:正确
B:错误
答案: 【错误】

9、 问题:when perform binary multiplication, 11*11, we may get 121
选项：
A:正确
B:错误
答案: 【错误】

10、 问题:when we might indicate a binay number 1 with signed character "1′, we may write as -1
选项：
A:正确
B:错误
答案: 【错误】

11、 问题:Substract hexadecimal numbers (81)H-(2a)H, the result is ()
答案: 【(5a)H】

12、 问题:the 8421 BCD code,has only ten symbols, 0000 through ()
答案: 【1001】

13、 问题:the corresponding BCD number of the decimal number 35 is ()
答案: 【00110101】

14、 问题:the corresponding decimal numner of the BCD 10001000 is ()
答案: 【88】

15、 问题:perform BCD addtion, 10001000+10000000, the result is()
答案: 【10011000】

16、 问题:the binary weight of 1 in BCD number 0010 is ()
答案: 【2】

17、 问题:In binary 1+1=()
答案: 【10】

18、 问题:BCD stands for ()
答案: 【Binary coded decimal】

19、 问题:CRC stands for ()
答案: 【cyclic redundancy check】

20、 问题:the binary number 1101 is eaqual to the decimal number ()
答案: 【13】

1 Introductory Concepts Test 1 of Introduction

1、 问题:An analog quantity is one having () values
选项：
A:continuous
B:discret
C:0
D:1
答案: 【continuous】

2、 问题:A digital quantity is one having a () set of values
选项：
A:continuous
B:discrete
C:0
D:1
答案: 【discrete】

3、 问题:Each of the two digits in the binary system, 1, and 0, is called a ()
选项：
A:bit
B:byte
C:word
D:none of the above
答案: 【bit】

4、 问题:The voltage used to represent a 1 and a 0 are called ()
选项：
A:logic levels
B:digigal levels
C:high levels
D:low levels
答案: 【logic levels】

5、 问题:() consists of voltage levels that are changing back and forth between the HIGH AND LOW levels or states
选项：
A:Digital waveforms
B:analog waveforms
C:high waveforms
D:low waveforms
答案: 【Digital waveforms】

6、 问题:most waveforms enountered in digital systems are composed of series of pulses,somethiems caled ()
选项：
A:pulse trains
B:period
C:frequency
D:phase
答案: 【pulse trains】

7、 问题:A periodic pulse waveform is one that repeats itself at a fixed interval, calle a ()
选项：
A:Period
B:Frequecny
C:Phase
D:None of the above
答案: 【Period】

8、 问题:In a portion of a periodic digital waveform, the measurements are in milliseconds, Period T=10, Width=1. Determining the duty cycle by
选项：
A:100hz
B:10ms
C:10%
D:none of the above
答案: 【10%】

9、 问题:Binary means having () states or values
选项：
A:2
B:3
C:4
D:5
答案: 【2】

10、 问题:Rise time of a waveform is the waveform rising from () to 90% of amplitude
选项：
A:10%
B:20%
C:30%
D:5%
答案: 【10%】

11、 问题:Generally, 1 is represented by the higher voltage, which we will refer to as a 
选项：
A:HIGH
B:LOW
C:BOTH OF HIGH AND LOW
D:NONE OF THE ABOVE
答案: 【HIGH】

12、 问题:A binary digit, which can be only 0
选项：