🎯 Interview Prep

Top Java Interview Questions

Java is the most commonly tested language in technical interviews — from fresher campus placements to senior backend roles. This page brings together every Java interview resource on TheCodeForge, organised by topic so you can prepare systematically.

46 Resources

Core Java Interview Questions

Top 50 Java Interview Questions Intermediate Java OOP Interview Questions Intermediate Java Collections Interview Questions Intermediate Java Multithreading Interview Q&A Advanced Java 8 Interview Questions Intermediate Spring Boot Interview Questions Intermediate

OOP & Design Patterns

Classes and Objects in Java Beginner Constructors in Java Beginner Inheritance in Java Intermediate Polymorphism in Java Intermediate Encapsulation in Java Intermediate Abstraction in Java Intermediate Interfaces in Java Intermediate Abstract Classes in Java Intermediate

Collections & Data Structures

Collections Framework Overview Intermediate ArrayList in Java Intermediate LinkedList in Java Intermediate HashMap in Java Intermediate HashSet in Java Intermediate TreeMap and TreeSet in Java Intermediate Stack and Queue in Java Intermediate Iterator and ListIterator in Java Intermediate

Multithreading & Concurrency

Multithreading in Java Advanced Thread Lifecycle in Java Advanced Synchronization in Java Advanced Executors and Thread Pools in Java Advanced volatile Keyword in Java Advanced Deadlock in Java Advanced wait notify and notifyAll in Java Advanced CompletableFuture in Java Advanced

Java 8+ Features

Lambda Expressions in Java Intermediate Stream API in Java Intermediate Optional Class in Java Intermediate Functional Interfaces in Java Intermediate Method References in Java Intermediate Default Methods in Interface Intermediate Date and Time API in Java 8 Intermediate forEach and Map Operations in Stream Intermediate

Spring Boot

Spring Boot Application Properties Explained Beginner Spring Boot Project Structure Beginner Spring Boot Auto-Configuration Explained Beginner Building a REST API with Spring Boot Beginner Spring Boot Annotations Cheat Sheet Beginner Spring Boot with MySQL and JPA Intermediate Spring Boot Exception Handling Intermediate Spring Boot Validation with Bean Validation API Intermediate

Browse all Interview resources

74 interview topics across coding patterns, HR questions, aptitude and more.

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