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Java Fundamentals

Beginner

Build a solid foundation in Java — the world's most widely used enterprise language. OOP, collections, streams, and design patterns.

📋 5 tracks ❓ 1,004 questions 💡 71 tips 🎬 10 videos ⏱ ~35h

Tracks

Master Java syntax, primitive types, operators, control flow, arrays, methods, and exception handling.

🧠 Practice

Build with classes, interfaces, inheritance, polymorphism, SOLID principles, and common design patterns.

🧠 Practice

Master ArrayList, HashMap, HashSet, generics, Comparable, Comparator, and the Collections utility class.

🧠 Practice

Write expressive Java with lambda expressions, functional interfaces, Stream API, Optional, and method references.

🧠 Practice

Understand Java threads, synchronization, ExecutorService, volatile, memory model, and modern Java features.

🧠 Practice

Certification Exam

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Certification Exam

Java Fundamentals

❓ 1004

Questions

⏱ 90m

Time Limit

% 70%

To Pass

All tracks · No time pressure to start

🏆

Certification Exam

Java Fundamentals

1004 Questions

All difficulty levels

⏱

90 Minutes

Auto-submits when time expires

70% to Pass

Earn your certification badge

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No Going Back

Once you answer, you move forward

Begin Exam

Tips

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Collections Beginner

Comparable vs Comparator

Natural order vs custom order

OOP Intermediate

Records with Custom Accessors and Compact Constructor

Customize record behavior

Generics Beginner

Type Erasure and Its Implications

What generics look like at runtime

JVM Intermediate

String Methods in Modern Java

Useful String additions since Java 11