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第一章 单元测试
1、单选题：
The number of values that can be assigned to a bit are ( )
A:one
B:two
C:three
D:ten
答案: two
2、单选题：
Compared to analog systems, digital systems ( )
A:are less prone to noise
B: can represent an infinite number of values
C:can handle much higher power
D: all of the above
答案: are less prone to noise
3、单选题：
The term bit means ( )
A:a small amount of data
B:a 1 or a 0
C:binary digit
D: both answers (b) and (c)
答案: both answers (b) and (c)
4、单选题：
A quantity has continuous value is ( )
A:a digital quantity
B:an analog quantity
C:a binary quantity
D:a natural quantity
答案: an analog quantity
5、单选题：
Verilog HDL is a ( )
A:logic device
B: hardware
C:computer language
D:programming logic device
答案: computer language
6、判断题：
A category of digital integrated circuits having functions that can be altered is known as fixed-function logic.
A:对
B:错
答案: 错
7、判断题：
Data are information only in numeric.
A:对
B:错
答案: 错
8、判断题：
Two broad types of digital integrated circuits are fixed-function and programmble.
A:对
B:错
答案: 对
9、判断题：
The nonrecurring engineering (NRE) cost for an ASIC design is normally low.
A:对
B:错
答案: 错
10、判断题：
There is an “invalid” region between the input ranges for logic 0 and logic 1
A:对
B:错
答案: 对
第二章 单元测试
1、单选题：
For the binary number 10000, the weight of the column with the 1 is ( )
A: 4
B:16
C:8
D:10
答案: 16
2、单选题：
The 2’s complement of 1000 is ( )
A:0111
B:1000
C:1001
D:1010
答案: 1000
3、单选题：
The fractional binary number 0.11 has a decimal value of ( )
A: ¼
B: ½
C:¾
D:none of the above
答案: ¾
4、单选题：
The number 1100 in BCD is ( )
A: equal to decimal eight
B:equal to decimal ten
C:equal to decimal twelve
D:invalid
答案: invalid
5、单选题：
An example of an unweighted code is ( )
A:binary
B:decimal
C:BCD
D:Gray code
答案: Gray code
6、单选题：
An example of an alphanumeric code is ( )
A:hexadecimal
B:ASCII
C:BCD
D:CRC
答案: ASCII
7、判断题：
The overflow occurs when adding the following 8-bit two’s complement number: 01011101+00110001
A:对
B:错
答案: 对
8、判断题：
The overflow does NOT occur when adding the following 8-bit two’s complement number:10111111+11011111
A:对
B:错
答案: 对
9、判断题：
In general, we need at most bits to express the product when multiplying an n-bit number by an m-bit number.
A:对
B:错
答案: 错
10、判断题：
An addition overflows if the addends’ signs are the same but the sum’s sign is different from the addends’.
A:对
B:错
答案: 对
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