# Digital Electronics - Logic Gates

### Exercise :: Logic Gates - General Questions

6.

The output of an OR gate with three inputs, A, B, and C, is LOW when ________.

 A. A = 0, B = 0, C = 0 B. A = 0, B = 0, C = 1 C. A = 0, B = 1, C = 1 D. all of the above

Explanation:

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7.

Which of the following logical operations is represented by the + sign in Boolean algebra?

 A. inversion B. AND C. OR D. complementation

Explanation:

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8.

Output will be a LOW for any case when one or more inputs are zero for a(n):

 A. OR gate B. NOT gate C. AND gate D. NOR gate

Explanation:

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9.

How many pins does the 4049 IC have?

 A. 14 B. 16 C. 18 D. 20

Explanation:

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10.

Which of the following choices meets the minimum requirement needed to create specialized waveforms that are used in digital control and sequencing circuits?

 A. basic gates, a clock oscillator, and a repetitive waveform generator B. basic gates, a clock oscillator, and a Johnson shift counter C. basic gates, a clock oscillator, and a DeMorgan pulse generator D. basic gates, a clock oscillator, a repetitive waveform generator, and a Johnson shift counter