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IGCSE Computer Science (9–1) 0984 · Topic 10

Boolean logic: past paper questions

17 real questionsasked in 7 of the last 10 exam series2020–2026usually: Draw, Write, Complete

Real questions on boolean logic

The newest 17 of 17 written questions. Open one to see it on the real paper.

  1. 0984/21 · May/June 2026 · Q8a[3]

    Write the logic expression for the given logic circuit.

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  2. 0984/21 · May/June 2026 · Q8b[4]

    0 0 0 1 1 1 1 (b) Complete the truth table for the given logic circuit. A B c working space X 0 0 0 1 1 0 1 1 0 0 0 1 1 0 1 1

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  3. 0984/22 · May/June 2026 · Q8a[5]

    Draw a logic circuit for this logic expression. Each logic gate must have a maximum of two inputs. Do not simplify the logic expression. A—— B— 4 Cc —

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  4. 0984/22 · May/June 2026 · Q8b[4]

    0 0 0 1 1 1 1 (b) Complete the truth table from the given logic expression. A B Cc working space Z 0 0 0 1 1 0 1 1 0 0 0 1 1 0 1 1

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  5. 0984/22 · October/November 2025 · Q6a[4]

    Draw a logic circuit for the logic expression. Each logic gate must have a maximum of two inputs. Do not simplify the logic expression. J K X L

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  6. 0984/22 · October/November 2025 · Q6b[4]

    Complete the truth table for the given logic expression. J K L 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 Working space X

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  7. 0984/21 · May/June 2025 · Q7a[4]

    Draw a logic circuit for this logic expression. Each logic gate must have a maximum of two inputs. A B X C Do not simplify the logic expression.

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  8. 0984/21 · May/June 2025 · Q7b[4]

    Complete the truth table for the given logic expression. A B C 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 Working space X

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  9. 0984/22 · May/June 2025 · Q8a[2]

    Draw the symbol for an XOR logic gate and complete the truth table for it. XOR logic gate symbol: Truth table: A B 0 0 0 1 1 0 1 1 X

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  10. 0984/22 · May/June 2025 · Q8b(i)[2]

    Write the logic expression for the crane moving. X =

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  11. 0984/22 · May/June 2025 · Q8b(ii)[4]

    Complete the truth table for the crane moving. A B C 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 Working space X

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  12. 0984/22 · October/November 2024 · Q9a[4]

    Draw a logic circuit for this logic expression. Each logic gate must have a maximum of two inputs. P Q X R Do not simplify the logic expression.

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  13. 0984/21 · May/June 2024 · Q8a[5]

    Draw a logic circuit for this logic expression. Each logic gate must have a maximum of two inputs. Do not simplify this logic expression. R S Z T

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  14. 0984/22 · May/June 2024 · Q8a[3]

    Write the logic expression for this problem.

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  15. 0984/21 · May/June 2023 · Q9a[4]

    Draw a logic circuit for this logic expression. Each logic gate must have a maximum of two inputs. Do not simplify this logic expression. A B Z C

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  16. 0984/12 · May/June 2022 · Q5a[5]

    Draw a logic circuit to represent the given logic statement. Do not attempt to simplify the logic statement. All logic gates must have a maximum of two inputs. A B X C

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  17. 0984/12 · October/November 2020 · Q4a[4]

    Draw a logic circuit to match the given logic statement. All logic gates must have a maximum of two inputs. Do not attempt to simplify the logic statement. A B X C

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What examiners said

This question was answered well by most of the candidates. Use of the original logic expression is recommended to answer this question.

— Examiner report, May/June 2025, 0984/21 Q7(b) (Cambridge)

Most candidates drew the correct XOR logic gate symbol, as shown on the syllabus, with two inputs and one output, and then correctly completed its truth table for it.

— Examiner report, May/June 2025, 0984/22 Q8(a) (Cambridge)

Most candidates gave a partially correct logic expression to represent the crane moving, as described in the question.

— Examiner report, May/June 2025, 0984/22 Q8(b)(i) (Cambridge)

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Boolean logic — IGCSE Computer Science (9–1) 0984 past paper questions | AssessPro