Ekta Agrawal on Instagram: "How does HashMap work internally? 🤯👇 Most asked Java Interview Question !! Stop memorizing theory! Visualize it. 🧠 Here is the step-by-step logic: 1️⃣ The Structure: It’s just an Array of "Buckets". 2️⃣ Hashing: hashCode() converts your Key into an Index (0-15). 3️⃣ The Collision: If two keys get the same index, they form a Linked List chain. 🔗 4️⃣ The Optimization: In Java 8+, if the chain gets too long (>8), it transforms into a Red-Black Tree for faster speed!
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Himanshi Sehgal on Instagram: "Java Interview Questions ✨ 1. What is Java? 2. What are the main features of Java? 3. What is the JVM? 4. What are JDK and JRE? 5. What are Java’s access specifiers? 6. What is garbage collection in Java? 7. What is the finalize() method? 8. What are the types of memory areas allocated by JVM? 9. What is the difference between an interface and an abstract class? 10. How do ArrayList, LinkedList, HashMap, HashSet, TreeMap, and TreeSet differ? 11. How does the HashMa
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