Digital Electronics-Combinational Logic Analysis
Digital Electronics-Combinational Logic Analysis
1. The output of an exclusive-NOR gate is 1. Which input combination is correct?
- A = 1, B = 0
- A = 0, B = 1
- A = 0, B = 0
- none of the above
2. Before an SOP implementation, the expression would require a total of how many gates?
- 1
- 2
- 4
- 5
3. One positive pulse with tw = 75 µs is applied to one of the inputs of an exclusive-OR circuit. A second positive pulse with tw = 15 µs is applied to the other input beginning 20 µs after the leading edge of the first pulse. Which statement describes the output in relation to the inputs?
- The exclusive-OR output is a 20 s pulse followed by a 40 s pulse, with a separation of 15 s between the pulses.
- The exclusive-OR output is a 20 s pulse followed by a 15 s pulse, with a separation of 40 s between the pulses.
- The exclusive-OR output is a 15 s pulse followed by a 40 s pulse.
- *The exclusive-OR output is a 20 s pulse followed by a 15 s pulse, followed by a 40 s pulse.
6. A 4-variable AND-OR circuit produces a 0 at its Y output. Which combination of inputs is correct?
- A = 0, B = 0, C = 1, D = 1
- A = 1, B = 1, C = 0, D = 0
- A = 1, B = 1, C = 1, D = 1
- A = 1, B = 0, C = 1, D = 0
7. A 4-variable AND-OR circuit produces a 1 at its Y output. Which combination of inputs is correct?
- A = 0, B = 0, C = 0, D = 0
- A = 0, B = 1, C = 1, D = 0
- A = 1, B = 1, C = 0, D = 0
- A = 1, B = 0, C = 0, D = 0
9. The output of a NAND gate is LOW when all inputs are HIGH at the same time
- TRUE
- FALSE
10. When the output of an AND-OR circuit is complemented, it results in an AND-OR-Invert circuit.
- TRUE
- FALSE