Boolean Algebra (AQA A-Level Computer Science): Flashcards

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Boolean Algebra
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Developer of Boolean algebra

George Boole (mid-1800s)

Boolean algebra output values

TRUE (1) or FALSE (0)

AND operation: when is output TRUE?

Only when all inputs are TRUE

OR operation: when is output TRUE?

When at least one input is TRUE

NOT operation function

Inverts the input value

NAND operation: when is output TRUE?

When at least one input is FALSE

XOR operation: when is output TRUE?

When exactly one input is TRUE

Truth table purpose

Shows output for all possible input combinations

De Morgan's: AB\overline{A \cdot B} equals

Aˉ+Bˉ\bar{A} + \bar{B}

Absorption Law: A+(AB)A + (A \cdot B) equals

AA

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