digital-electronics-logic-gates Related Question Answers

51. What is the Boolean expression for a four-input OR gate?





52. How many truth table entries are necessary for a four-input circuit?





53. How many entries would a truth table for a four-input NAND gate have?





54. The Boolean expression for a 3-input OR gate is ________.





55. From the truth table for a three-input NOR gate, what is the only condition of inputs A, B, and C that will make the output X high?





56. The logic gate that will have a LOW output when any one of its inputs is HIGH is the:





57. The output of a NAND gate is LOW if ________.





58. A truth table illustrates how the input level of a gate responds to all the possible output level combinations.



59. A NOR gate output is LOW if any of its inputs is LOW.



60. As a rule, CMOS has the lowest power consumption of all IC families.



61. A popular waveform generator is the Johnson shift counter.



62. Good troubleshooting is done by looking at the input signal and how it interacts with the circuits.



63. A NOR gate and an OR gate operate in exactly the same way.



64. An OR array is programmed by blowing fuses to eliminate selected variables from the output functions.



65. A NAND gate output is LOW only if all the inputs are HIGH.



66. An AND gate output is LOW if all the inputs are HIGH.



67. Power is connected to pins 7 and 14 of a 7408 quad two-input AND gate IC to allow voltage for all four AND gates on the IC.



68. An exclusive-NOR gate output is HIGH when the inputs are unequal.



69. An OR gate output is HIGH only if all the inputs are HIGH.



70. A waveform can be enabled or disabled by both AND and OR gates.



71. An exclusive-OR gate output is HIGH when the inputs are unequal.



72. In a Boolean equation the use of the + symbol represents the OR function.



73. A logic gate has one or more output terminals and one input terminal.



74. A logic pulser is used to determine the level of floating in a circuit.



75. An inverter output is the complement of its input.



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