HardJava
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.
Git, Linux & DevOps quizzes
Git, the Linux command line, Docker, Kubernetes, CI/CD and the cloud
Quizzes
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.