Java quizzes

Syntax, object-oriented programming, collections, the JVM and the Java ecosystem

Quizzes

Java Quiz: advanced memory, threads and modern API

Test your advanced Java knowledge: heap and stack, garbage collector, immutable String, threads, synchronized, volatile, ExecutorService, Optional and records.

MediumJava

Java Quiz: OOP, inheritance, interfaces and collections

Test your object-oriented programming knowledge in Java: inheritance, interfaces, encapsulation, static, exceptions, collections, generics and equals.

EasyJava

Java Quiz: language basics, types and syntax

Test your Java basics: its creator, the JVM, the JDK and the JRE, the boolean and char types, String, arrays, the main method and class names.

See questions and answers

Quizzes

Java Quiz: advanced memory, threads and modern API

Java Quiz: OOP, inheritance, interfaces and collections

Java Quiz: language basics, types and syntax

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