Lesson 4.4.1.10

4.4.1.10 Composition Quiz: AQA Computer Science, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.4.1.10, Composition: 20 multiple choice questions for the AQA Computer Science (7517), Unit 4: Theory of computation, written with Revision Ninja.

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The 20 questions

  1. What type of abstraction builds compound procedures by combining simpler procedures?

    • Procedural composition
    • Data abstraction
    • Procedural decomposition
    • Problem reduction

  2. What action demonstrates procedural composition in functional programming?

    • Dividing into subroutines
    • Deleting unused code
    • Declaring local variables
    • Chaining function calls

  3. In the functional composition expression f(g(x)), which function is evaluated first?

    • Function f
    • Both simultaneously
    • Neither function
    • Function g

  4. According to the AQA specification, which data structure is a classic example of data composition?

    • Tree structure
    • Boolean flag
    • Floating-point number
    • Primitive integer

  5. What is created when several different data types are combined into a single record?

    • Atomic data type
    • Compound data object
    • Abstract model
    • Procedural decomposition

  6. How does composition fundamentally differ from procedural decomposition in problem solving?

    • It combines parts
    • It breaks down
    • It removes detail
    • It executes code

  7. A program calculates a total price by first calling a function to find the tax and then a function to add it. Which principle is shown?

    • Bubble sort
    • Representational abstraction
    • Binary search
    • Composition of procedures

  8. Which of the following represents a compound data structure built using data composition?

    • Single character
    • Integer constant
    • Machine instruction
    • Nested list

  9. Implementing a stack using an array and a top pointer is an example of what?

    • Procedural decomposition
    • Automation
    • Functional programming
    • Data composition

  10. If f(x) = x + 3 and g(x) = 2x, what is f(g(5))?

    • 13
    • 16
    • 25
    • 11

  11. Two procedures are composed so that the first returns a list and the second sums it. What is the result for the list [1, 2, 3]?

    • 123
    • [1, 2, 3]
    • 6
    • 3

  12. What is the main purpose of composition abstraction in computer science?

    • Removing unnecessary details
    • Breaking down problems
    • Executing compiled code
    • Combining simpler components

  13. Which process builds compound procedures or data from simpler components?

    • Composition
    • Generalisation
    • Automation
    • Decomposition

  14. A procedure is built from a sequence of smaller procedures, each used once. Which abstraction is this?

    • Representational abstraction
    • Information hiding
    • Sorting
    • Composition of procedures

  15. What type of abstraction is formed by combining data objects into a tree structure?

    • Procedural abstraction
    • Data abstraction
    • Functional abstraction
    • Control abstraction

  16. Combining multiple procedures to form a single compound procedure is an example of what?

    • Procedural decomposition
    • State transition
    • Data modelling
    • Procedural composition

  17. What is formed when multiple procedures are combined using composition?

    • Compound procedure
    • State machine
    • Abstract data type
    • Decomposed module

  18. Combining a parser function and a validator function into one single function demonstrates what?

    • Decomposition
    • Composition
    • Encapsulation
    • Automation

  19. Given square(x) = x * x and add1(x) = x + 1, what is square(add1(2))?

    • 5
    • 4
    • 6
    • 9

  20. Combining two data items together into a single structure creates what type of data?

    • Compound data
    • Decomposed data
    • Atomic data
    • Primitive data

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