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Facade pattern
Term Y11 OOP
Definition
A design pattern where a simple class provides one easy interface that hides a complex set of subsystem classes behind it.
Example: A OrderFacade class calls the Stock, Payment and Delivery classes for the user.
Found in: syllabus.
Where it is used in the test
Syllabus area: Y11 OOP.
Question types it can appear in
- Multiple choice: Pick the option that matches the definition or example.
- Short answer: Describe the facade pattern
- Drawing: class diagram
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: Facade pattern in The Object-Oriented Paradigm (Year 11) · study that set
- Memorise: Object-oriented concepts
- Notes: Object-oriented concepts (Year 11 content (Programming fundamentals, OOP, Mechatronics))
How to use it in an answer
A model sentence
“A design pattern where a simple class provides one easy interface that hides a complex set of subsystem classes behind it.” Then apply it: A OrderFacade class calls the Stock, Payment and Delivery classes for the user.
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
No linked question shows the command word for this term. Across the past short answer and drawing questions in this bank the words used most are: Explain, Outline, Describe, Compare, Classify, Analyse. Check the actual word in your question.
Technique for the question types
- Multiple choice: Read all four options, rule out wrong ones, pick one; no penalty for guessing so never leave blank.
- Short answer: One clear point per mark, use the stimulus and course terms, and answer the command word.
- Drawing: Use the online drawing tool: label every symbol and arrow, use the correct symbols from the specification, and add every required item.
Common mistakes
- Drawing questions (2025 HSC exam Q22): refine attributes into separate inherited classes; use appropriate class diagram symbols.
- 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: Task definition · Agility · Consistency (collaboration) · Code commenting · Version control · Feedback