Java Programming Online Quiz
Practice Java syntax, Object-Oriented principles, JVM memory architecture, Collections, Multithreading, and Stream API with real-time scoring.
Select Your Difficulty Level
Choose a tier to launch a randomized 10-question Java assessment:
Java Quiz Curriculum & Topics Covered
🟢 Beginner / Easy Level
Class structure, main method signature, primitive types vs wrapper classes (Integer, Double), basic operators, loops (for, while, do-while), string operations (String, StringBuilder), and simple arrays.
🟡 Intermediate / Moderate Level
Core OOP mechanisms (Encapsulation, Inheritance, Polymorphism, Abstraction), Interfaces vs Abstract Classes, Collections Framework (ArrayList, HashMap, TreeSet), Checked vs Unchecked Exceptions, Method Overloading/Overriding, and Generics basics.
🔴 Advanced / Hard Level
JVM Memory model (Stack vs Heap, PermGen/Metaspace), Garbage Collection algorithms (G1, ZGC), Multithreading & Synchronization (synchronized, volatile, ReentrantLock, ExecutorService), Reflection API, Java 8+ Streams, Lambda expressions, and ClassLoader hierarchy.