Phase 21 · Data Structures & Algorithms
TopicsTree
Part of the Frontend Developer Roadmap.
Summary
A hierarchical data structure of nodes with parent-child relationships — binary trees and BSTs are a huge, recurring category in interviews.
How to Learn This
- 1Implement tree traversals: inorder, preorder, postorder, and level-order (BFS).
- 2Solve classic problems: max depth, validate a BST, lowest common ancestor.
- 3Practice both recursive and iterative traversal implementations.
More topics in Data Structures & Algorithms
Stuck on this topic? Ask an Insider
Get 1:1 guidance from people who've walked this exact path — free on the InsideEdge app.