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Flashcards Edexcel GCSE Computer Science

1.3 Truth tables

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Logic is used to work out whether an outcome is:
True or False
The outcome of applying logic is always:
Either true or false
Which logic operation produces an output that is the opposite of the input?
NOT
The AND operation produces a true output only when:
Both inputs are true
The OR operation produces a true output when:
Either input is true
How many rows are present in a truth table for a two-input logic operation?
4
How many rows are present in a truth table for a three-input logic operation?
8
In a truth table, each row represents a specific combination of:
Inputs
Which truth table represents the NOT operation?
A | Q 0 | 1 1 | 0
Which truth table represents the AND operation?
A | B | Q 0 | 0 | 0 0 | 1 | 0 1 | 0 | 0 1 | 1 | 1
Which truth table represents the OR operation?
A | B | Q 0 | 0 | 0 0 | 1 | 1 1 | 0 | 1 1 | 1 | 1
Which truth table represents (NOT A) AND B?
A | B | Q 0 | 0 | 0 0 | 1 | 1 1 | 0 | 0 1 | 1 | 0
Which truth table represents NOT(A AND B)?
A | B | Q 0 | 0 | 1 0 | 1 | 1 1 | 0 | 1 1 | 1 | 0