Digital Concepts - General Questions (10)

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Digital Concepts - General Questions

73.

A common instrument used in troubleshooting a digital circuit is a(n) ________.

A.	logic probe
B.	oscilloscope
C.	pulser
D.	all of the above

Answer: Option D

Explanation:

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74.

Digital representations of numerical values of quantities may BEST be described as having characteristics:

A.	that are difficult to interpret because they are continuously changing.
B.	that vary constantly over a continuous range of values.
C.	that vary in constant and direct proportion to the values they represent.
D.	that vary in discrete steps in proportion to the values they represent.

Answer: Option D

Explanation:

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75.

Convert the fractional binary number 0000.1010 to decimal.

A.	0.625
B.	0.50
C.	0.55
D.	0.10

Answer: Option A

Explanation:

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76.

In positive logic, ________.

A.	a HIGH = 1, a LOW = 0
B.	a LOW = 1, a HIGH = 0
C.	only HIGHs are present
D.	only LOWs are present

Answer: Option B

Explanation:

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77.

In a certain digital waveform, the period is four times the pulse width. The duty cycle is ________.

A.	0%
B.	25%
C.	50%
D.	100%

Answer: Option B

Explanation:

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78.

Digital signals transmitted on a single conductor (and a ground) must be transmitted in:

A.	slow speed.
B.	parallel.
C.	analog.
D.	serial.

Answer: Option D

Explanation:

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79.

A flip-flop has ________.

A.	one stable state
B.	no stable states
C.	two stable states
D.	none of the above

Answer: Option C

Explanation:

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80.

one data input and a number of selection inputs, and they have several outputs

A.	one data input and a number of selection inputs, and they have several outputs
B.	one input and one output
C.	several inputs and several outputs
D.	several inputs and one output

Answer: Option A

Explanation:

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