Digital Electronics - Digital Concepts

Exercise :: Digital Concepts - General Questions

31. 

The rise time is the time it takes a pulse to go from ________.

A. the base line to the maximum HIGH voltage
B. 10% of the pulse amplitude to the maximum HIGH voltage
C. the base line to 90% of the pulse amplitude
D. 10% of the pulse amplitude to 90% of the pulse amplitude

Answer: Option D

Explanation:

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32. 

What is an analog-to-digital converter?

A. It makes digital signals.
B. It takes analog signals and puts them in digital format.
C. It allows the use of digital signals in everyday life.
D. It stores information on a CD.

Answer: Option B

Explanation:

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33. 

A multiplexer has ________.

A. one input and several outputs
B. one input and one output
C. several inputs and several outputs
D. several inputs and one output

Answer: Option D

Explanation:

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34. 

What is the decimal value of 23 ?

A. 2
B. 4
C. 6
D. 8

Answer: Option D

Explanation:

23 = 2*2*2=8

35. 

An encoder converts ________.

A. noncoded information into coded form
B. coded information into noncoded form
C. HIGHs to LOWs
D. LOWs to HIGHs

Answer: Option A

Explanation:

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