171. Nota
172. For a three-input NOR gate, with the input waveforms as shown below, which output waveform is correct?
(a) a
(b) b
(c) c
(d) d
173. Which logic gate does this truth table describe?
(a) AND
(b) OR
(c) NAND
(d) NOR
174. A NOR gate with one HIGH input and one LOW input:
(a) will output a HIGH
(b) functions as an AND
(c) will not function
(d) will output a LOW
175. An OR gate with inverted inputs functions as:
(a) an AND gate.
(b) a NAND gate.
(c) a NOR gate.
(d) an inverter.
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Logic Gates » Exercise - 2 51. Which type of gate can be used to add two bits? (a) Ex-OR (b) Ex-NOR (c) Ex-NAND (d) NOR 52. Show from the truth table how an exclusive-OR gate can be used to invert the data on one input if the other input is a special control function. (a) Using A as the control, when A = 0, X is the same as B. When A = 1, X is the same as B. (b) Using A as the control, when A = 0, X is the same as B. When A = 1, X is the inverse of B. (c) Using A as the control, when A = 0, X is the inverse of B. When A = 1, X is the same as B. (d) Using A as the control, when A = 0, X is the inverse of B. When A = 1, X is the inverse of B. 53. Parity systems are defined as either________ or ________ and will add an extra ________ to the digital information being transmitted. (a) positive, negative, byte (b) odd, even, bit (c) upper, lower, digit (d) on, off, decimal 54. The Ex-NOR is sometimes called…
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