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Ready-made quizzes, prepared ahead of time. Free, ad-supported.

• Spring Boot 4 fundamentals

  Check what you know about Spring Boot 4 and Spring Framework 7.

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• Java 21 language features

  Records, pattern matching, virtual threads, and more from the Java 21 LTS.

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• English vocabulary — B2

  Intermediate-to-upper vocabulary at CEFR level B2.

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• Spanish vocabulary — B1

  Common intermediate vocabulary and connectors at CEFR level B1.

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