Java MCQ test
Check your Java knowledge with a free online quiz. Each attempt picks 15 multiple-choice questions at random, from fresher to experienced level, and shows your score with the right answer and an explanation for every question.
15 random Java questions · no time limit
A new mix every attempt. You see your score and every explanation at the end.
What this Java test covers
- OOP: classes, interfaces, inheritance and polymorphism
- Collections: List, Set, Map and their trade-offs
- Exceptions and resource handling
- Threads, executors and synchronisation
- Memory, garbage collection and the JVM
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