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Java · Junior · Theory

Why does Java have generics, and what is type erasure?

~4 min by voice

How to approach it

This checks whether you understand that generics are a compiler mechanism for type safety, not a runtime feature, and whether you know the consequences of type erasure and the rules for working with wildcards.

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genericstype erasure
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Answer by voice

The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.

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Best with headphones · ~4 min