OCR GCSE Computer Science (J277)

2.4.1 Boolean Logic: revision quiz and key terms

Free practice for 2.4.1 Boolean Logic in OCR GCSE Computer Science (J277). Try the questions, then check the key terms.

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Question 1 · Multiple choice

What is the output of NOT (1 AND 0)?

Question 2 · True or false?

The OR gate produces a true output when at least one input is true.

Question 3 · Multiple choice

How many possible rows does a truth table with three inputs have?

Question 4 · True or false?

An AND gate outputs 1 if either one of its inputs is 1.

Question 5 · Multiple choice

Which Boolean expression gives an output of 1 only when A is 1 and B is 0?

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Key terms for 2.4.1 Boolean Logic

AND gate: A logic gate that outputs 1 only when both inputs are 1.
Boolean: A value that can only be true or false (1 or 0).
Logic diagram: A diagram using standard symbols to show how logic gates are connected.
Logic gate: An electronic component that performs a Boolean operation on one or more inputs.
NOT gate: Reverses the value of a single input.
OR gate: Produces a true output when at least one input is true.
Truth table: A table showing the output of a logic circuit for every possible combination of inputs.

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