Digital Concepts - General Questions (11)

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Digital Concepts - General Questions

81.

Which of the following is not an analog device?

A.	Thermocouple
B.	Current flow in a circuit
C.	Light switch
D.	Audio microphone

Answer: Option C

Explanation:

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82.

The output of an OR gate is LOW when ________.

A.	all inputs are LOW
B.	any input is LOW
C.	any input is HIGH
D.	all inputs are HIGH

Answer: Option A

Explanation:

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83.

The output of a NOT gate is HIGH when ________.

A.	the input is LOW
B.	the input is HIGH
C.	the input changes from LOW to HIGH
D.	voltage is removed from the gate

Answer: Option A

Explanation:

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84.

A DAC changes ________.

A.	an analog signal into digital data
B.	digital data into an analog signal
C.	digital data into an amplified signal
D.	none of the above

Answer: Option B

Explanation:

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85.

Parallel format means that:

A.	each digital signal has its own conductor.
B.	several digital signals are sent on each conductor.
C.	both binary and hexadecimal can be used.
D.	no clock is needed.

Answer: Option B

Explanation:

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86.

Give the decimal value of binary 10010.

A.	610
B.	910
C.	1810
D.	2010

Answer: Option C

Explanation:

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87.

The output of an AND gate is LOW ________.

A.	all the time
B.	when any input is LOW
C.	when any input is HIGH
D.	when all inputs are HIGH

Answer: Option B

Explanation:

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88.

A full subtracter circuit requires ________.

A.	two inputs and two outputs
B.	two inputs and three outputs
C.	three inputs and one output
D.	three inputs and two outputs

Answer: Option D

Explanation:

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