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Boolean Logic and Expressions
Boolean Logic · 5 question types
Exam Frequency Analysis
Past paper frequency (2018 to 2024)
This topic accounts for approximately 6% of your exam marks.
stable
Low
Writing Boolean expressions from logic diagrams and simplifying using laws appear regularly.
When the question gives you a truth table and asks for the Boolean expression, the standard method is: write one AND term per row where the output is 1, then OR all those AND terms together.
Method. (1) Find every row where
Q = 1. (2) For each such row, write an AND term that is true on that row only: use the variable directly when its value in that row is1, and¬variablewhen its value is0. (3) OR all the AND terms together.