Flashcards in AQA AS Computing: 7.1 Logic gates and Boolean algebra Deck (12)

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## Boolean Variable

### A variable that may have two discrete possible values, e.g. true or false

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## Truth Table

### A table that shows the result of applying the logical function to all possible combinations of inputs

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## OR Function

### The output is true if either or both inputs are true

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## AND Function

### The output is true if all inputs are true

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## NOT Function

### The output is the inverse of the input

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## Boolean Equation

### An equation that expresses a Boolean output Q in terms of Boolean inputs X, Y, Z etc, to which one or more Boolean functions (such as OR, AND and NOT) are applied

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## Logic Gate

### An electronic circuit that performs a Boolean function

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## Exclusive OR Function

### The output is true if either input is true but not if both inputs are true

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## NAND Function

### The output is true is any input is false

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## NOR Function

### The output is true only when all inputs are false

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## Today, what types of logic gates are processors made up of?

### They are made up of NAND gates and NOR gates

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