Digital Electronics-Logic Gates
Digital Electronics-Logic Gates
1. The output of an AND gate with three inputs, A, B, and C, is HIGH when ________.
- A = 1, B = 1, C = 0
- A = 0, B = 0, C = 0
- A = 1, B = 1, C = 1
- A = 1, B = 0, C = 1
2. If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
- 1
- 2
- 7
- 8
3. If a signal passing through a gate is inhibited by sending a LOW into one of the inputs, and the output is HIGH, the gate is a(n):
- AND
- NAND
- NOR
- OR
4. A device used to display one or more digital signals so that they can be compared to expected timing diagrams for the signals is a:
- DMM
- spectrum analyzer
- logic analyzer
- frequency counter
5. The output of an OR gate with three inputs, A, B, and C, is LOW when ________.
- A = 0, B = 0, C = 0
- A = 0, B = 0, C = 1
- A = 0, B = 1, C = 1
- all of the above
6. Which of the following logical operations is represented by the + sign in Boolean algebra?
- inversion
- AND
- OR
- complementation
7. Output will be a LOW for any case when one or more inputs are zero for a(n):
- OR gate
- NOT gate
- AND gate
- NOR gate
9. Which of the following choices meets the minimum requirement needed to create specialized waveforms that are used in digital control and sequencing circuits?
- basic gates, a clock oscillator, and a repetitive waveform generator
- basic gates, a clock oscillator, and a Johnson shift counter
- basic gates, a clock oscillator, and a DeMorgan pulse generator
- basic gates, a clock oscillator, a repetitive waveform generator, and a Johnson shift counter
10. TTL operates from a ________.
- 9-volt supply
- 3-volt supply
- 12-volt supply
- 5-volt supply