juniorTrie
What is a Trie (Prefix Tree)?
Updated Apr 28, 2026
Short answer
A Trie is a specialized tree-based data structure used to store a dynamic set of strings where keys are usually strings.
Deep explanation
Detailed theoretical explanation of What is a Trie (Prefix Tree)?. A Trie (retrieval tree) stores keys in a path from root to leaf. It is highly efficient for prefix-based queries.
Real-world example
Dictionary apps or spell checkers.
Common mistakes
- Forgetting to mark the 'isEndOfWord' flag, resulting in failed searches for complete words.
Follow-up questions
- Can a Trie store integers?