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🔸 TLDR ▪️ Refactoring = improving code structure without changing what it does ✅ ▪️ Do it in small safe steps, supported by tests 🧪 ▪️ Wear “two hats”: either you change behavior or you improve design—not both at once 🎩 🔸 WHAT IS REFACTORING? ▪️ It’s a disciplined way to make...

Java’s type system has a few “ghost” types: the compiler uses them, you benefit from them… but you can’t write their names in source code. These are non-denotable types. 🔸 TLDR ▪️ Java has types that exist in the spec/compiler but have no usable name in your code. ▪️ null has its own special type...

🔸 WHY SPRING CERTIFICATION IS A GREAT ASSET TODAY ▪️ Validates real-world, production-ready skills (Boot 3, Spring 6) ▪️ Recognized by employers and clients across industries ▪️ Proves you can design, secure, and operate cloud-native apps 🔸 BENEFITS OF STUDYING THE TOPICS ▪️ Deepens...