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Java Tech Community on Instagram: "#If you’re preparing for Java interviews, understanding How HashMap works internally is absolutely mandatory. Most Java developers fail interviews not because they don’t use HashMap, but because they cannot explain its internal working and real scenario-based questions. If you want to crack your next backend interview, start by mastering the internal process of HashMap 👇 💡 Hashing, Buckets, Collisions, Load Factor, Resizing, Rehashing… and the exact flow inte
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Anurag on Instagram: "⚙️ HashMap Internal Working (Java) • 🧮 Uses hashCode() to find bucket • 📍 Index = hash % size • 🔗 Collision → LinkedList • 🌳 Too many collisions → Red-Black Tree (Java 8+) Search Time Complexity: • ⚡ Average: O(1) • 🚨 Worst: O(log n) 📌 Summary: HashMap stores data in buckets using hashing. It resolves collisions using LinkedList and optimizes performance with trees when needed — that’s why it’s fast! 🚀 Topics Touched: [Java DSA, LLD, Map, HashMap, LinkedHashMap, Tree
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