juniorHash Tables
Explain Separate Chaining.
Updated Apr 28, 2026
Short answer
A collision resolution technique where each bucket contains a linked list of entries that hash to the same index.
Deep explanation
Hash tables are fundamental for fast lookups. A collision resolution technique where each bucket contains a linked list of entries that hash to the same index. By using a mathematical transformation, they bypass linear scanning required by arrays.
Real-world example
A dictionary or phonebook lookup.
Common mistakes
- Assuming hash tables are always O(1) without considering collision frequency.
Follow-up questions
- What happens if the table is too full?