Object-oriented programming · interview question

Given the code snippet below, how can you make the 'orders' list immutable to protect it from external modifications?

Multiple choiceHardchapter-3-curatedpremiumoopdefensive-copying

java

private List<Order> orders;

public List<Order> getOrders() {
    return new ArrayList<>(orders);
}

Use a synchronized listUse a vector instead of an ArrayListReturn a defensive copy of the listReturn the list directly

Answer and explanation

Correct answer

C. Return a defensive copy of the list

Why

To protect the 'orders' list, you should return a defensive copy. This ensures that external code cannot modify the internal list, preserving encapsulation.

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Given the code snippet below, how can you make the 'orders' list immutable to protect it from external modifications?

Correct answer

Why

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