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Stacks: AQA A‑Level Computer Science questions

Every AQA A-Level Computer Science exam question on 4.2.3 Stacks, 2020–2025, with its mark scheme and examiner’s report.

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561 questions

  1. Q06.4

    June 2024 · Paper 1

    1 mark4.2.3 Stacks
    The whole paper ↗
    June 2024 Paper 1, question 06.4: State the type of data structure the algorithm shown in Figure 5 implements using the array Temp. [1 mark]

  2. Q02.3

    June 2022 · Paper 1

    1 mark4.2.3 Stacks
    The whole paper ↗
    June 2022 Paper 1, question 02.3: What value will be returned by applying the peek operation to S? [1 mark]

  3. Q02.4

    June 2022 · Paper 1

    1 mark4.2.3 Stacks
    The whole paper ↗
    June 2022 Paper 1, question 02.4: What value will be returned by applying the pop operation to S? [1 mark]

  4. Q02.5

    June 2022 · Paper 1

    2 marks4.2.3 Stacks4.2.2 Queues
    The whole paper ↗
    June 2022 Paper 1, question 02.5: Explain how a single stack can be used to reverse the order of the items in a queue. [2 marks]

  5. Q02.3

    November 2021 · Paper 1

    7 marks4.3.2 Tree-traversal4.2.3 Stacks
    The whole paper ↗
    November 2021 Paper 1, question 02.3: Complete the unshaded cells in Table 2 to show the result of the subroutine call Traversal(0) Table 2 Stack Current Pos [0] [1] [2] [3] Output Copy the contents
All 5 questions on Stacks, as a list
  1. June 2024, Paper 1, Q06.4 (1 mark): State the type of data structure the algorithm shown in Figure 5 implements using the array Temp. [1 mark]
  2. June 2022, Paper 1, Q02.3 (1 mark): What value will be returned by applying the peek operation to S? [1 mark]
  3. June 2022, Paper 1, Q02.4 (1 mark): What value will be returned by applying the pop operation to S? [1 mark]
  4. June 2022, Paper 1, Q02.5 (2 marks): Explain how a single stack can be used to reverse the order of the items in a queue. [2 marks]
  5. November 2021, Paper 1, Q02.3 (7 marks): Complete the unshaded cells in Table 2 to show the result of the subroutine call Traversal(0) Table 2 Stack Current Pos [0] [1] [2] [3] Output Copy the contents

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