#Microservices In Java Interview Questions

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✅ Correct Answer (copy-paste this): HashMap stores data using a hashing mechanism where the key’s hashCode() determines the bucket, and equals() ensures correct key matching. ⸻ Internal Working (Step-by-Step) 1. Key’s hashCode() is calculated 2. Hash is converted into an index (bucket) 3. Entry is stored as a Node (key, value, hash) 4. If collision occurs: • Java 7 → Linked List • Java 8+ → Tree (Red-Black Tree after threshold) ⸻ Why Java 8 Changed This • Improves performance • Lookup becomes O(log n) instead of O(n) ⸻ Simple Real-World Example • Bucket → Locker • Hash → Locker number • Collision → Multiple items in same locker ⸻ In Java Terms • Uses hashCode() + equals() • Default capacity → 16 • Load factor → 0.75 Follow @the_code_lab_ for more such content! #oopsconcepts #javabasic #javainterview #hashmap #datastructures softwareengineer backenddeveloper codingreels programminglife techreels interviewprep careerintech developersofinstagram

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