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LOGIC GATES MCQs

Total Questions : 93 | Page 7 of 10 pages
Question 61. . The term "hex inverter" refers to:
  1.    an inverter that has six inputs
  2.    six inverters in a single package
  3.    a six-input symbolic logic device
  4.    an inverter that has a history of failure
 Discuss Question
Answer: Option B. -> six inverters in a single package
Question 62. . With regard to an AND gate, which statement is true?
  1.    An AND gate has two inputs and one output.
  2.    An AND gate has two or more inputs and two outputs.
  3.    If one input to a 2-input AND gate is HIGH, the output reflects the other input.
  4.    A 2-input AND gate has eight input possibilities.
 Discuss Question
Answer: Option C. -> If one input to a 2-input AND gate is HIGH, the output reflects the other input.
Question 63. . How many inputs are on the logic gates of a 74HC21 IC?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4
Question 64. . The NOR logic gate is the same as the operation of the ________ gate with an inverter connected to the output.
  1.    OR
  2.    AND
  3.    NAND
  4.    none of the above
 Discuss Question
Answer: Option A. -> OR
Question 65. . The basic logic gate whose output is the complement of the input is the:
  1.    OR gate
  2.    AND gate
  3.    inverter
  4.    comparator
 Discuss Question
Answer: Option C. -> inverter
Question 66. . What is the name of a digital circuit that produces several repetitive digital waveforms?
  1.    an inverter
  2.    an OR gate
  3.    a Johnson shift counter
  4.    an AND gate
 Discuss Question
Answer: Option C. -> a Johnson shift counter
Question 67. . The basic types of programmable arrays are made up of ________.
  1.    AND gates
  2.    OR gates
  3.    NAND and NOR gates
  4.    AND gates and OR gates
 Discuss Question
Answer: Option D. -> AND gates and OR gates
Question 68. . When reading a Boolean expression, what does the word "NOT" indicate?
  1.    the same as
  2.    inversion
  3.    high
  4.    low
 Discuss Question
Answer: Option B. -> inversion
Question 69. . How many AND gates are found in a 7411 IC?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option C. -> 3
Question 70. . Which of the following equations would accurately describe a four-input OR gate when A = 1, B = 1, C = 0, and D = 0?
  1.    1 + 1 + 0 + 0 = 01
  2.    1 + 1 + 0 + 0 = 1
  3.    1 + 1 + 0 + 0 = 0
  4.    1 + 1 + 0 + 0 = 00
 Discuss Question
Answer: Option B. -> 1 + 1 + 0 + 0 = 1

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