Inheritance

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Definition

A subclass (child) automatically gets the attributes and methods of a superclass (parent) and can add or change its own, giving code reuse. It models an 'is-a' relationship.

Example: Student inherits name and age from Person; the arrow points from Student to Person.

Found in: syllabus, course specifications, 2025 HSC marking guidelines, sample exam and familiarisation guidelines, school notes, past SDD papers.

Short version to memorise (key terms bank)

Subclass reuses and extends a superclass.

Where you'll use it in the test

Syllabus area: Y11 OOP.

Question types it can appear in

Drawing: inheritance arrow on a class diagram
Python: class Child(Parent)
Multiple choice: Pick the option that matches the definition or example.
Short answer: Define, outline or explain it and tie it to the scenario.

Where it has appeared in the paper

The Software Engineering Project (Part A, B). Part letters follow each paper’s own layout.

How to use it

A model sentence

General advice, built from the definition and example above

“A subclass (child) automatically gets the attributes and methods of a superclass (parent) and can add or change its own, giving code reuse.” Then apply it: Student inherits name and age from Person; the arrow points from Student to Person.

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.

Command words used with it

General advice

No linked question shows the command word for this term. Across the past drawing and python and short answer questions in this bank the words used most are: Explain, Outline, Describe, Compare, Classify, Analyse. Check the actual word in your question.

Go deeper

Flashcard: Inheritance in The Object-Oriented Paradigm (Year 11) · study that set
Memorise: Object-oriented concepts
Key terms bank entry: Inheritance
Notes: Inheritance (Year 11 content (Programming fundamentals, OOP, Mechatronics))
Notes: Python OOP: classes, inheritance, polymorphism, encapsulation (Python and SQL you must be able to write)
Notes: Programming paradigms (Year 11 content (Programming fundamentals, OOP, Mechatronics))
Full term page: every question, note and marking comment for Inheritance

Check yourself

Explain “Inheritance” in one sentence, give an example, and name a question type that could test it.

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