D:a natural quantity答案: Gray code答案: an analog quantityAn example of an alphanumeric code is (     )

The number of values that can be assigned to a bit are (     )

A:one

B:two

C:three

D:ten

答案: two

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

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)

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

Verilog HDL is a (     )

A:logic device

B: hardware

C:computer language

D:programming logic device

答案: computer language

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

Data are information only in numeric.

A:对
B:错
答案: 错

Two broad types of digital integrated circuits are fixed-function and programmble.

A:对
B:错
答案: 对

The nonrecurring engineering (NRE) cost for an ASIC design is normally low.

A:对
B:错
答案: 错

There is an “invalid” region between the input ranges for logic 0 and logic 1

A:对
B:错
答案: 对

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

The 2’s complement of 1000 is (     )

A:0111
B:1000
C:1001
D:1010
答案: 1000

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

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

An example of an unweighted code is (     )

A:binary

B:decimal

C:BCD

D:Gray code

答案: Gray code

An example of an alphanumeric code is (     )

A:hexadecimal

B:ASCII

C:BCD

D:CRC

答案: ASCII

The overflow occurs when adding the following 8-bit two’s complement number: 01011101+00110001

A:对
B:错
答案: 对

The overflow does NOT occur when adding the following 8-bit two’s complement number:10111111+11011111

A:对
B:错
答案: 对

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

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