Object-oriented programming · interview question
Given the following code snippet, what is the issue with the 'changeQuantity' method?
Multiple choiceHardchapter-3-curatedpremiumoopcontrolled-mutation
public void changeQuantity(int quantity) { this.quantity = quantity; }Answer and explanation
Correct answer
D. It allows negative quantities, leading to invalid state
Why
The method allows setting a negative quantity, which can lead to an invalid state for the product. Validation should ensure that only valid quantities (e.g., non-negative) are set.
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