Exam-style question
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What is the main purpose of data abstraction?.
- A.To expose every implementation detail of a data object
- B.To isolate how a compound data object is used from how it is constructed
- C.To ensure that all data objects are represented as arrays
- D.To remove the need for data objects in a program
Model answer
What a good answer should say
- To isolate how a compound data object is used from how it is constructed
Explanation
Why this works
Data abstraction separates the way a compound data object is used from the details of its construction.
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