Truth Tables (AQA GCSE Computer Science): Flashcards
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Definition of a truth table
Definition of a truth table
Shows all possible input combinations & their outputs for a logic system
Purpose of truth tables in logic systems
Purpose of truth tables in logic systems
See how logic gate/circuit behaves in every situation
What a NOT gate does to its input
What a NOT gate does to its input
Produces opposite output (0→1, 1→0)
Alternative name for NOT gate
Alternative name for NOT gate
Inverter
Meaning of circle symbol on logic gate
Meaning of circle symbol on logic gate
Signal is inverted/NOT/opposite
When does AND gate output 1?
When does AND gate output 1?
Only when both inputs are 1
When does OR gate output 1?
When does OR gate output 1?
When at least one input is 1
When does XOR gate output 1?
When does XOR gate output 1?
Only when exactly one input is 1 (inputs differ)
Key difference between XOR and OR gates
Key difference between XOR and OR gates
XOR excludes case where both inputs are 1
What are logic gates?
What are logic gates?
Building blocks of computer circuits
How to analyse combined logic circuits
How to analyse combined logic circuits
Work left to right, step by step through each gate
What does AND gate + NOT gate create?
What does AND gate + NOT gate create?
NAND gate