Software Engineering › Key terms › Y11 OOP › Constructor (__init__)
Constructor (__init__)
Term Check Y11 OOP
Definition
A special method that runs when an object is created and sets its starting attribute values (in Python it is __init__).
Example: def __init__(self, name): self.name = name
Check this one: The syllabus says implement OOP code but does not name constructors; Python classes need __init__ so it is a safe code-pattern card.
Where it is used in the test
Syllabus area: Y11 OOP.
Question types it can appear in
- Python: Write a class with __init__
- Code reading: Code or algorithm reading: interpret a fragment and state its output or purpose.
- Multiple choice: Pick the option that matches the definition or example.
No past question in this bank is linked to this term yet. It can still be tested through the question types above.
Study links
- Flashcard: Constructor (__init__) in The Object-Oriented Paradigm (Year 11) · study that set
- Memorise: Object-oriented concepts
- Notes: Python OOP: classes, inheritance, polymorphism, encapsulation (Python and SQL you must be able to write)
- Notes: Programming ML in an OOP language (example only) (Software Automation (Year 12))
How to use it in an answer
A model sentence
“A special method that runs when an object is created and sets its starting attribute values (in Python it is __init__).” Then apply it: def __init__(self, name): self.name = name
In a short answer, give the definition in your own words first, then tie it to the situation in the question. Do not copy the example above unless it fits the scenario.
Technique for the question types
- Python: Write code that runs: indentation, quotes, define functions before calling them, print the required output, meet every listed requirement.
- Multiple choice: Read all four options, rule out wrong ones, pick one; no penalty for guessing so never leave blank.
Common mistakes
- Check the sources: The syllabus says implement OOP code but does not name constructors; Python classes need __init__ so it is a safe code-pattern card.
- Python questions (2025 HSC exam Q19): process string inputs; use a selection structure; code must execute in the environment; use correct indentation; call functions in the main program after defining them.
- Python questions (2025 HSC exam Q26): replicate the grid; use the random library; use selection and looping to access the list; include a method of checking the number of values; use meaningful variable names and constants; avoid overly complex structures such as nested IF loops.
- Use the term exactly as the syllabus words it, then link it to the scenario in the question; the 2025 feedback repeatedly rewards using the stimulus.
- Answer the command word: outline gives main points only, explain gives a reason or cause, discuss gives both sides.
Related terms
Same group in the syllabus: Object-oriented programming (OOP) · Class · Object · Attribute · Method · Encapsulation · Abstraction · Inheritance · Generalisation · Superclass and subclass · Polymorphism · Method overriding · Message passing · Procedural programming v OOP