161. Assume that you have a 3-input NAND gate but need only a 2-input gate. The unused input should be ________.
(a) connected to ground
(b) left open
(c) connected to a HIGH
(d) any of the above
162. A node is defined as ________.
(a) a common point in a circuit
(b) a circuit implemented as a sum-of-products
(c) the output signals from a circuit
(d) a shorted input
163. For a three-input OR gate, with the input waveforms as shown below, which output waveform is correct?
(a) a
(b) b
(c) c
(d) d
164. Nota
165. A small circle on the output of a logic gate is used to represent the:
(a) Comparator operation.
(b) OR operation.
(c) NOT operation.
(d) AND operation.
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