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Internal Working of HashMap
- HashMap uses an array of buckets where each bucket can hold one or more key-value pairs.
- When inserting a key, its hashCode() is calculated to find the index in the array.
- Collisions are resolved by storing keys in a linked list or Red-Black Tree if entries grow beyond 8 (Java 8+).
- Searching in HashMap involves using the hash to locate the correct bucket and checking entries with .equals().
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