Boolean Algebra Quiz

Give the relationship that represents the dual of the Boolean property A + 1 = 1?
(Note: * = AND, + = OR and ' = NOT)
  1. A * 1 = 1
  2. A * 0 = 0
  3. A + 0 = 0
  4. A * A = A
  5. A * 1 = 1

A * 0 = 0 is CORRECT. The dual of any Boolean property may be obtained by interchanging all occurrences of the symbols (*,+,0,1) with the symbols (+,*,1,0). Beware of implicit AND operations (like xy); these ANDs are also converted to +. Therefore, the dual of x + 1 = 1 is: x*0 = 0.

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Composed by David Belton - April 98