# Digital Electronics - Digital Concepts

### Exercise :: Digital Concepts - General Questions

21.

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 A

Explanation:

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22.

Convert the fractional binary number 0000.1010 to decimal.

 A. 0.625 B. 0.5 C. 0.55 D. 0.1

Answer: Option A

Explanation:

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23.

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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24.

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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25.

The parallel transmission of digital data:

 A. is much slower than the serial transmission of data. B. requires only one signal line between sender and receiver. C. requires as many signal lines between sender and receiver as there are data bits. D. is less expensive than the serial method of data transmission.

Answer: Option C

Explanation:

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