Learning objective
Information hiding: Be familiar with the process of hiding all details of an object that do not contribute to its essential characteristics.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Abstraction and automation
Subtopic
Information hiding
Study support
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Quick explanation
Information hiding: Be familiar with the process of hiding all details of an object that do not contribute to its essential characteristics
- This point belongs to Abstraction and automation, especially Information hiding.
- You need to be able to information hiding: Be familiar with the process of hiding all details of an object that do not contribute to its essential characteristics.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Why it matters
This objective helps connect Information hiding to exam-style questions, flashcards, and revision notes for Abstraction and automation.
Quick student answer
What is the main purpose of information hiding?
Direct answer
To hide details of an object that do not contribute to its essential characteristics
Key terms
- Information hiding: The process of hiding all details of an object that do not contribute to its essential characteristics.
- Essential characteristic: A characteristic that contributes to describing what an object essentially is and should therefore be retained when applying information hiding.
Common trap
Hiding every characteristic: Retain the essential characteristics and hide only the details that do not contribute to them.
Related questions
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Related learning objectives
- Problem-solving: Be able to develop solutions to simple logic problems. Be able to check solutions to simple logic problems.
Problem-solving
- Following and writing algorithms: Understand the term algorithm. A sequence of steps that can be followed to complete a task and that always terminates. Be able to express the solution to a simple problem as an algorithm using pseudo-code, with the standard constructs: • sequence • assignment • selection • iteration. Be able to hand-trace algorithms. Be able to convert an algorithm from pseudo- code into high level language program code. 54 Be able to articulate how a program works, arguing for its correctness and its efficiency using logical reasoning, test data and user feedback.
Following and writing algorithms
- Abstraction: Be familiar with the concept of abstraction as used in computations and know that: • representational abstraction is a representation arrived at by removing unnecessary details • abstraction by generalisation or categorisation is a grouping by common characteristics to arrive at a hierarchical relationship of the 'is a kind of' type.
Abstraction
- Procedural abstraction: Know that procedural abstraction represents a computational method. The result of abstracting away the actual values used in any particular computation is a computational pattern or computational method - a procedure.
Procedural abstraction
- Functional abstraction: Know that for functional abstraction the particular computation method is hidden. The result of a procedural abstraction is a procedure, not a function. To get a function requires yet another abstraction, which disregards the particular computation method. This is functional abstraction.
Functional abstraction