# Digital Electronics - Digital Concepts

### Exercise :: Digital Concepts - General Questions

41.

How many binary bits are necessary to represent 748 different numbers?

 A. 9 B. 7 C. 10 D. 8

Answer: Option C

Explanation:

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42.

A periodic digital waveform has a pulse width (tw) of 6 ms and a period (T) of 18 ms. The duty cycle is ________.

 A. 3.3% B. 33.3% C. 6% D. 18%

Answer: Option B

Explanation:

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43.

Any number with an exponent of one is equal to:

 A. zero. B. one. C. two. D. that number.

Answer: Option D

Explanation:

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44.

Serial format means digital signals are:

 A. sent over many conductors simultaneously. B. sent over one conductor sequentially. C. sent in groups of eight signals. D. sent in binary coded decimal.

Answer: Option B

Explanation:

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45.

What is the decimal value of 2–1 ?

 A. 0.5 B. 0.25 C. 0.05 D. 0.1

Answer: Option A

Explanation:

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