Encapsulation

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Definition

Bundling an object's data and the methods that use it together in a class and restricting direct access to the data (private attributes, accessed through methods) so it stays valid and secure.

Example: Make balance private and change it only through deposit() so it cannot be set to a negative number directly.

Found in: syllabus, course specifications, school notes, past SDD papers.

Short version to memorise (key terms bank)

Data and methods bundled and protected.

Where you'll use it in the test

Syllabus area: Y11 OOP.

Question types it can appear in

Multiple choice: Pick the option that matches the definition or example.
Matching or table: Match it to its description, example or category.
Short answer: Explain how encapsulation protects data
Fill in the blanks: Choose this term to complete a statement or table.

How to use it

A model sentence

General advice, built from the definition and example above

“Bundling an object's data and the methods that use it together in a class and restricting direct access to the data (private attributes, accessed through methods) so it stays valid and secure.” Then apply it: Make balance private and change it only through deposit() so it cannot be set to a negative number directly.

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

Check yourself

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

Reveal the answer

Bundling an object's data and the methods that use it together in a class and restricting direct access to the data (private attributes, accessed through methods) so it stays valid and secure.

Example: Make balance private and change it only through deposit() so it cannot be set to a negative number directly.

Could be tested as: Multiple choice, Matching or table, Short answer, Fill in the blanks.