Lesson 2.2.1b

2.2.1b Modularity, parameter passing, IDEs and object-oriented techniques Quiz: OCR Computer Science, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 2.2.1b, Modularity, parameter passing, IDEs and object-oriented techniques: 20 multiple choice questions for the OCR Computer Science (H446), Unit 7: Problem solving and programming, written with Revision Ninja.

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The 20 questions

  1. What happens to the original argument when a parameter is passed by value?

    • It is deleted
    • It is overwritten
    • Throws an error
    • It remains unchanged

  2. What is passed to a subroutine when a parameter is passed by reference?

    • Copy of data
    • Memory address
    • Variable name
    • Data type

  3. What is the main difference between a function and a procedure?

    • Functions return values
    • Procedures use parameters
    • Procedures return values
    • Functions accept parameters

  4. Which object-oriented concept restricts direct access to an object's internal data?

    • Encapsulation
    • Inheritance
    • Polymorphism
    • Instantiation

  5. What OOP feature allows a subclass to acquire methods from a parent class?

    • Polymorphism
    • Encapsulation
    • Abstraction
    • Inheritance

  6. Which term describes methods with the same name behaving differently across different classes?

    • Encapsulation
    • Polymorphism
    • Instantiation
    • Inheritance

  7. Which special method is automatically executed when a new object is created?

    • Setter method
    • Constructor
    • Getter method
    • Destructor

  8. Which IDE tool allows a programmer to pause code execution at a specific line?

    • Breakpoint
    • Variable watch
    • Compiler
    • Syntax checker

  9. Which feature of an IDE editor highlights language keywords in different colours?

    • Auto-completion
    • Code folding
    • Pretty printing
    • Syntax highlighting

  10. A variable containing 10 is passed by value to a subroutine that doubles it. What is its final value?

    • 5
    • 20
    • 0
    • 10

  11. A variable containing 10 is passed by reference to a subroutine that doubles it. What is its final value?

    • 20
    • 10
    • 5
    • 0

  12. What is the process of creating a concrete object from a class definition called?

    • Overriding
    • Inheritance
    • Encapsulation
    • Instantiation

  13. How should attributes in a class be declared to enforce strict encapsulation?

    • Global
    • Private
    • Static
    • Public

  14. How does a subclass redefine a method inherited from its parent superclass?

    • Method encapsulation
    • Method instantiation
    • Method overloading
    • Method overriding

  15. Why are local variables preferred over global variables in modular programming?

    • Enables syntax checking
    • Prevents unintended side-effects
    • Reduces file size
    • Increases execution speed

  16. Which debugging technique allows a developer to execute code line-by-line to trace logic?

    • Refactoring
    • Profiling
    • Stepping
    • Compiling

  17. What is a class in object-oriented programming best defined as?

    • Blueprint for objects
    • Running process
    • Executable file
    • Instance of object

  18. Which IDE feature displays the current values of specific variables as code executes?

    • Stack trace
    • Watch window
    • Breakpoint
    • Output window

  19. What is a subroutine called that is defined inside an object-oriented class?

    • Attribute
    • Method
    • Interface
    • Parameter

  20. What term describes defining multiple methods in the same class with identical names but different parameters?

    • Method overriding
    • Method overloading
    • Method recursion
    • Method encapsulation

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