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LOGIC GATES MCQs

Total Questions : 93 | Page 8 of 10 pages
Question 71. . The output of an exclusive-NOR gate is HIGH if ________.
  1.    the inputs are equal
  2.    one input is HIGH, and the other input is LOW
  3.    the inputs are unequal
  4.    none of the above
 Discuss Question
Answer: Option A. -> the inputs are equal
Question 72. . Which of the following is not a basic Boolean operation?
  1.    OR
  2.    NOT
  3.    AND
  4.    FOR
 Discuss Question
Answer: Option D. -> FOR
Question 73. . CMOS IC packages are available in ________.
  1.    DIP configuration
  2.    SOIC configuration
  3.    DIP and SOIC configurations
  4.    neither DIP nor SOIC configurations
 Discuss Question
Answer: Option C. -> DIP and SOIC configurations
Question 74. . The logic gate that will have HIGH or "1" at its output when any one (or more) of its inputs is HIGH is a(n):
  1.    OR gate
  2.    AND gate
  3.    NOR gate
  4.    NOT operation
 Discuss Question
Answer: Option A. -> OR gate
Question 75. . What is the Boolean expression for a four-input OR gate?
  1.    Y = A + B + C + D
  2.    Y = A· B · C · D
  3.    Y = A – B – C – D
  4.    Y = A $ B $ C $ D
 Discuss Question
Answer: Option A. -> Y = A + B + C + D
Question 76. . How many entries would a truth table for a four-input NAND gate have?
  1.    2
  2.    8
  3.    16
  4.    32
 Discuss Question
Answer: Option C. -> 16
Question 77. . Which of the following gates is described by the expression ?X=ABCD?
  1.    OR
  2.    AND
  3.    NOR
  4.    NAND
 Discuss Question
Answer: Option D. -> NAND
Question 78. . How many truth table entries are necessary for a four-input circuit?
  1.    4
  2.    8
  3.    12
  4.    16
 Discuss Question
Answer: Option D. -> 16
Question 79. . The Boolean expression for a 3-input OR gate is ________.
  1.    X = A + B
  2.    X = A + B + C
  3.    X = ABC
  4.    X = A + BC
 Discuss Question
Answer: Option B. -> X = A + B + C
Question 80. . The output of a NAND gate is LOW if ________.
  1.    all inputs are LOW
  2.    all inputs are HIGH
  3.    any input is LOW
  4.    any input is HIGH
 Discuss Question
Answer: Option B. -> all inputs are HIGH

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