Java Quiz

Enterprise programming language

Practice Java with 90 questions spread across 3 difficulty levels, roughly 150 minutes of practice in total. Every question comes with a written explanation, so a wrong answer teaches you something. Useful for interview preparation, for checking your own level before taking on a project, or just for finding the gaps in what you know.

Choose your difficulty level

Beginner

Java Fundamentals

Master Java basics including syntax, data types, OOP concepts, and core APIs

30 questions45 min

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Intermediate

Java Development

Explore collections, exception handling, generics, and design patterns

30 questions60 min

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Advanced

Java Expert Level

Equality, generics, collections, concurrency and the JVM memory model — read from real code rather than definitions.

30 questions45 min

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