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Units of information: AQA A‑Level Computer Science questions

Every AQA A-Level Computer Science exam question on 4.5.3 Units of information, 2020–2025, with its mark scheme and examiner’s report.

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Calculations

561 questions

  1. Q02.1

    June 2025 · AS Paper 2

    1 mark4.5.3 Units of information
    The whole paper ↗
    June 2025 AS Paper 2, question 02.1: How many different values can be represented using one byte? [1 mark]

  2. Q02.2

    June 2024 · Paper 2

    1 mark4.5.6 Representing images, sound and other data4.5.3 Units of information
    The whole paper ↗
    June 2024 Paper 2, question 02.2: How many images, taken using the camera referred to in Question 02.1, could be stored on a 256 gigabyte memory card? You should assume that all of the storage s

  3. Q03.5

    June 2024 · Paper 2

    2 marks4.7.1 Internal hardware components of a computer4.5.3 Units of information
    The whole paper ↗
    June 2024 Paper 2, question 03.5: The computer’s address bus uses 36 wires/lines and each main memory location can hold a 16-bit data value. In gibibytes, express the maximum amount of main memo

  4. Q02.2

    June 2023 · AS Paper 2

    1 mark4.5.3 Units of information
    The whole paper ↗
    June 2023 AS Paper 2, question 02.2: How many different values can be represented using 10 bits? [1 mark]

  5. Q03.1

    June 2023 · AS Paper 2

    1 mark4.5.3 Units of information
    The whole paper ↗
    June 2023 AS Paper 2, question 03.1: Shade in one lozenge to indicate which of the following prefixes represents 106 [1 mark] A kibi B mebi C gibi D kilo E mega F giga

  6. Q03.2

    November 2020 · Paper 2

    1 mark4.5.3 Units of information
    The whole paper ↗
    November 2020 Paper 2, question 03.2: The computer has 4 gibibytes of memory installed. How many kibibytes is this equivalent to? [1 mark] Answer

  7. Q01.2

    November 2020 · AS Paper 2

    1 mark4.5.3 Units of information
    The whole paper ↗
    November 2020 AS Paper 2, question 01.2: How many different values can be represented using two bytes? [1 mark]
All 7 questions on Units of information, as a list
  1. June 2025, AS Paper 2, Q02.1 (1 mark): How many different values can be represented using one byte? [1 mark]
  2. June 2024, Paper 2, Q02.2 (1 mark): How many images, taken using the camera referred to in Question 02.1, could be stored on a 256 gigabyte memory card? You should assume that all of the storage s
  3. June 2024, Paper 2, Q03.5 (2 marks): The computer’s address bus uses 36 wires/lines and each main memory location can hold a 16-bit data value. In gibibytes, express the maximum amount of main memo
  4. June 2023, AS Paper 2, Q02.2 (1 mark): How many different values can be represented using 10 bits? [1 mark]
  5. June 2023, AS Paper 2, Q03.1 (1 mark): Shade in one lozenge to indicate which of the following prefixes represents 106 [1 mark] A kibi B mebi C gibi D kilo E mega F giga
  6. November 2020, Paper 2, Q03.2 (1 mark): The computer has 4 gibibytes of memory installed. How many kibibytes is this equivalent to? [1 mark] Answer
  7. November 2020, AS Paper 2, Q01.2 (1 mark): How many different values can be represented using two bytes? [1 mark]

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