Class diagram inheritance and multiplicity

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Definition

Inheritance is shown by an arrow from the subclass to the superclass. Multiplicity (1, 0..*, 1..*) shows how many objects can be related: a student studies 1 or more subjects; a subject has 0 or more students.

Example: Student ---- 1..* Subject.

Found in: course specifications, sample exam and familiarisation guidelines, school notes.

Where you'll use it in the test

Syllabus area: Diagrams and tools.

Question types it can appear in

Drawing: Draw or label it in the online drawing tool.
Multiple choice: Pick the option that matches the definition or example.

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

Diagram: “Inheritance is shown by an arrow from the subclass to the superclass.” Then apply it: Student ---- 1..* Subject.

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.

Go deeper

Flashcard: Class diagram inheritance and multiplicity in Diagrams and Modelling Tools (Years 11 and 12) · study that set
Memorise: Drawing rules: DFD, structure chart, storyboard, decision tree, class diagram, ERD
Full term page: every question, note and marking comment for Class diagram inheritance and multiplicity

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Describe or sketch “Class diagram inheritance and multiplicity”: what it shows, its parts and when you would use it.

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