Java · Senior · Theory

You have a Java service with a 30 GB heap, and the business is complaining about long pauses. How would you choose and tune the garbage collector?

~4 min by voice

How to approach it

The interviewer wants to see whether you diagnose a pause problem from data rather than tweaking flags blindly, whether you understand how G1 and modern low-pause collectors (ZGC, Shenandoah) work, whether you know their cost, and whether you can verify a change safely in production.

Have you seen this question in a real interview?

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Topics

jvm garbage collection

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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