Mastering Java 2025 – 400 Free Practice Questions to Pass the 'Thinking in Java' Exam

Question: 1 / 510

How does Java achieve type erasure with generics?

By removing all type parameters at runtime

Unlike static-typing languages such as C++, Java does not include generic type information in its runtime representation of objects. Therefore, at runtime, all generic types are replaced with their non-generic types, also known as type erasure. This allows Java to maintain backward compatibility with older versions of the language and reduce the amount of runtime overhead. Options B, C, and D are incorrect because they do not accurately describe how Java achieves type erasure with generics.

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By converting all objects to type Object

By using dynamic type checking

By subclassing the generic type

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