Object-oriented programming · interview question
How can you design a 'Cart' class to maintain a list of 'CartItem' objects and ensure the total price is always up to date?
Multiple choiceHardchapter-2-curatedpremiumoopobject-references
Answer and explanation
Correct answer
C. Use an observer pattern to update the total price.
Why
Using an observer pattern allows the 'Cart' class to automatically update the total price whenever an individual 'CartItem' changes. This ensures consistency and reduces the likelihood of errors.
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