Скачать или смотреть Important Java Topics

Important java topics
to cover for interview

📌 Beginner Topics (Foundation)

JVM, JDK, JRE

Data Types, Variables

Operators, Loops, Conditions

Arrays & Strings

Methods & Constructor

OOP (Encapsulation, Inheritance, Polymorphism, Abstraction)

Static & Final

Packages & Access Modifiers


📌 Intermediate Topics

Collections Framework (List, Set, Map)

HashMap Internal Working

Exception Handling

File Handling

Java 8 Features (Lambda, Streams, Functional Interfaces)

Wrapper Classes

Autoboxing & Unboxing

Generics

Serialization & Deserialization


📌 Advanced Topics

Multithreading & Concurrency

Executor Framework

Synchronization, Locks

JVM Architecture in Depth

Garbage Collection

ClassLoaders

Memory Management (Stack, Heap, GC)

Design Patterns

Spring & Spring Boot (Basics)

Microservices Concepts

REST APIs

Hibernate & JPA

CI/CD Basics (Maven, Gradle, Docker)



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