Starter quiz
- What are the binary digits?
- 1 ✓
- 0 ✓
- True
- 8
-
- What do logical operations operate on?
- statements that are either True or False ✓
- binary circuits
- numbers
- hardware components
-
- What is the result of the statement "NOT raining" when it is raining?
- True
- False ✓
- What do binary digits represent in hardware logic?
- True or False values ✓
- electrical noise in the circuit
- unprocessed data
-
- A Boolean logic system in computers processes data using 1s and 0s, which represent high and ______ voltages.
- 'low' ✓
- Logic gates are physical components used in computers to carry out ______ operations.
- logical ✓
- arithmetic
- graphical
-
Exit quiz
- Who introduced Boolean logic?
- George Boole ✓
- Claude Shannon
- Charles Babbage
- Alan Turing
-
- What does a Boolean expression evaluate to?
- True or False ✓
- a numerical value
- a text message
-
- Which of the following is an example of a Boolean statement?
- The sky is blue. ✓
- Please open the window.
- What is your favourite film?
- How old are you?
-
- Which logic gate has only one input and one output?
- NOT ✓
- AND
- OR
-
- What is the output of an AND gate when both inputs are 1?
- '1' ✓
- How many possible input combinations exist for an AND gate with two inputs?
- 4 ✓
- 1
- 2
- 8
-
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Boolean logic is a form of algebra where all logical relations can be expressed as a combination of AND, OR and NOT.
- A logic gate is a fundamental component of a digital circuit.
- Each logic gate has a symbol, which is used in circuit diagrams.
- Each logic gate has a unique truth table that shows how the output changes with different inputs.
Common misconception
All logic gates have two inputs and one output.
The number of inputs depends on the logic gate. The NOT gate is different in that it only has one input.
Keywords
Boolean - an expression that evaluates to either True or False
Logic gate - an electronic component that carries out a logical operation
Truth table - a table showing the outputs for all possible combinations of inputs to a logic gate
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