Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

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What is the difference between List<Apple> and List<? extends Fruit>?

List<Apple> can contain any type of Fruit
List<? extends Fruit> specifies a List of any type that extends Fruit
List<Apple> and List<? extends Fruit> are the same
There is no difference, it's a matter of syntax

The correct answer is: List<? extends Fruit> specifies a List of any type that extends Fruit

List<Apple> specifies a List that can only contain Apple objects, while List<? extends Fruit> specifies a List that can contain any type of Fruit (including Apple). Option A is incorrect because List<Apple> can only contain Apple objects, not any type of Fruit. Option C is incorrect because List<Apple> and List<? extends Fruit> have different specifications. Option D is incorrect because there is a clear distinction between List<Apple> and List<? extends Fruit> in terms of which types of objects they can contain.