Java · Junior · Theory

Why do we need thread pools, and how do you work with ExecutorService?

~4 min by voice

How to approach it

The interviewer wants to see whether you understand why a pool exists at all (threads are expensive, resources need to be controlled) and whether you can actually use ExecutorService: create a pool, submit a task, get the result through a Future and shut the pool down properly.

Have you seen this question in a real interview?

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Topics

multithreading executors

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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.

Best with headphones · ~4 min