2.4 Boolean Logic

Question 1

Define logic gate

Answer 1

Logic gates are special circuits built into computer chips. They receive binary data, apply a Boolean operation then output a binary result.

Question 2

Define NOT gate

Answer 2

NOT gates take a single input and give a single output. The output is always the opposite value to the input.

Question 3

Define AND gate

Answer 3

AND gates take two inputs and give one output. If both inputs are 1, the output is 1, otherwise the output is 0.

Question 4

Define OR gate

Answer 4

OR gates take two inputs and give one output. If one or both inputs are 1, then the output is 1, otherwise the output is 0.

Question 5

Define truth table

Answer 5

The truth table is a table, showing the output for all possible combinations of inputs to a logic gate or circuit.