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Java · Senior · System design

You've been asked to upgrade a large service from Java 11 and Spring Boot 2 to Java 21 and Spring Boot 3. How would you plan and carry out the migration, and what risks do you expect?

~10 min by voice

How to approach it

This checks whether the candidate can manage a large, risky change: whether they know Boot 3's real breaking changes (javax→jakarta, Hibernate 6, Security 6, JDK requirements), split the migration into verifiable steps, protect themselves with tests, a canary and rollback, and can explain to the business why it's needed.

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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 · ~10 min