Java Variables की Deep Dive | Scope, Naming Rules और Memory

Master Java Variables & Data Types from scratch — with real examples, memory concepts, and interview tips! Perfect for beginners starting their Java journey in Hindi. In this video (Day 2 of Java Series), we cover everything you need to know about Variables and Data Types in Java — explained in simple Hindi with visual diagrams and live coding.✅ What You'll Learn: What are variables in Java & how memory works All 8 Primitive Data Types (byte, short, int, long, float, double, char, boolean) Non-Primitive Data Types overview How to calculate data type ranges (byte, int, etc.) Scope of variables: Local vs Class-Level Java naming conventions & rules Why local variables MUST be initialized (with live demo) Common Java interview questions on data types ⏱️ Timestamps: 00:00 – Introduction 00:33 – What is a Variable? (with analogy) 07:00 – Data Type Hierarchy & Mind Map 11:05 – Interview Q: Why is char 2 bytes? (Unicode & signed numbers) 13:20 – Data Type Range Calculation (byte range formula) 16:15 – Local vs Class-Level Scope 29:35 – Local Variable Initialization Rule (Live Coding Demo) 34:00 – Compile vs Execute Process Explained 📌 This video is perfect for: ✔️ Java beginners | ✔️ Students & Job Seekers | ✔️ Automation Testers🔔 Subscribe for the full #Java #JavaTutorial #JavaForBeginners #LearnJava #JavaHindi #Programming