Boolean Algebra | Logic Simplification MCQs

26. According to commutative law of multiplication,

  1. AB = BA
  2. A = AA
  3. (AB)C = A(BC )
  4. A0 = A

Answer
Answer. a

27. According to the distributive law,

  1. A(B + C) = AB + AC
  2. A(BC) = ABC
  3. A(A + 1) = A
  4. A + AB = A

Answer
Answer. a

28. Which of the following rules states that if one input of an AND gate is always 1, the output is equal to the other input?

  1. A + 1 = 1
  2. A + A = A
  3. A . A = A
  4. A . 1 = A

Answer
Answer. d

29. According to DeMorgan’s theorems, the complement of a product of variables is equal to

  1. the complement of the sum
  2. the sum of the complements
  3. the product of the complements
  4. answers (a), (b), and (c)

Answer
Answer. b

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